# quadratic formula examples

Step 2: Plug into the formula. Notice that 2 is a FACTOR of both the numerator and denominator, so it can be cancelled. Recall the following definition: If a negative square root comes up in your work, then your equation has complex solutions which can be written in terms of \(i\). One absolute rule is that the first constant "a" cannot be a zero. - "Cups" Quadratic Formula - "One Thing" Quadratic Formula Lesson Notes/Examples Used AB Partner Activity Description: - Divide students into pairs. But, it is important to note the form of the equation given above. The purpose of solving quadratic equations examples, is to find out where the equation equals 0, thus finding the roots/zeroes. Quadratic equations are in this format: ax 2 ± bx ± c = 0. The purpose of solving quadratic equations examples, is to find out where the equation equals 0, thus finding the roots/zeroes. Applying this formula is really just about determining the values of a, b, and cand then simplifying the results. The Quadratic Formula . An equation p(x) = 0, where p(x) is a quadratic polynomial, is called a quadratic equation. Roughly speaking, quadratic equations involve the square of the unknown. For example: Content Continues Below. Solve Using the Quadratic Formula. Here we will try to develop the Quadratic Equation Formula and other methods of solving the quadratic … Here are examples of quadratic equations in the standard form (ax² + bx + c = 0): Here are examples of quadratic equations lacking the linear coefficient or the "bx": Here are examples of quadratic equations lacking the constant term or "c": Here are examples of quadratic equation in factored form: (2x+3)(3x - 2) = 0 [upon computing becomes 6x² + 5x - 6]. Example 3 – Solve: Step 1: To use the quadratic formula, the equation must be equal to zero, so move the 7x and 6 back to the left hand side. Suppose, ax² + bx + c = 0 is the quadratic equation, then the formula to find the roots of this equation will be: x = [-b±√(b 2-4ac)]/2. Example 7 Solve for y: y 2 = –2y + 2. Looking at the formula below, you can see that a, b, and c are the numbers straight from your equation. However, there are complex solutions. Applying the value of a,b and c in the above equation : 22 − 4×1×1 = 0. The solutions to this quadratic equation are: \(x= \bbox[border: 1px solid black; padding: 2px]{1+2i}\) , \(x = \bbox[border: 1px solid black; padding: 2px]{1 – 2i}\). The ± means there are TWO answers: x = −b + √(b 2 − 4ac) 2a. How to Solve Quadratic Equations Using the Quadratic Formula. Now, if either of … Thanks to all of you who support me on Patreon. Answer. The quadratic formula helps us solve any quadratic equation. Examples. See examples of using the formula to solve a variety of equations. A quadratic equation is any equation that can be written as \(ax^2+bx+c=0\), for some numbers \(a\), \(b\), and \(c\), where \(a\) is nonzero. Quadratic Formula Discriminant of ax 2 +bx+c = 0 is D = b 2 - 4ac and the two values of x obtained from a quadratic equation are called roots of the equation which denoted by α and β sign. We will see in the next example how using the Quadratic Formula to solve an equation with a perfect square also gives just one solution. The essential idea for solving a linear equation is to isolate the unknown. A quadratic equation is an equation of the second degree, meaning it contains at least one term that is squared. Usually, the quadratic equation is represented in the form of ax 2 +bx+c=0, where x is the variable and a,b,c are the real numbers & a ≠ 0. Solving Quadratic Equations Examples. x2 − 2x − 15 = 0. Example 9.27. Quadratic Formula Examples. Quadratic sequences are related to squared numbers because each sequence includes a squared number an 2. Quadratic Equations. You need to take the numbers the represent a, b, and c and insert them into the equation. Look at the following example of a quadratic … Jun 29, 2017 - The Quadratic Formula is a great method for solving any quadratic equation. But sometimes, the quadratic equation does not come in the standard form. Some examples of quadratic equations are: 3x² + 4x + 7 = 34. x² + 8x + 12 = 40. $1 per month helps!! Make your child a Math Thinker, the Cuemath way. It's easy to calculate y for any given x. Understanding the quadratic formula really comes down to memorization. Example 2: Quadratic where a>1. There are three cases with any quadratic equation: one real solution, two real solutions, or no real solutions (complex solutions). So, the solution is {-2, -7}. From these examples, you can note that, some quadratic equations lack the … That is, the values where the curve of the equation touches the x-axis. Use the quadratic formula steps below to solve problems on quadratic equations. That is, the values where the curve of the equation touches the x-axis. Once you have the values of \(a\), \(b\), and \(c\), the final step is to substitute them into the formula and simplify. Look at the following example of a quadratic equation: x 2 – 4x – 8 = 0. The standard form is ax² + bx + c = 0 with a, b, and c being constants, or numerical coefficients, and x is an unknown variable. x=\dfrac{-(-6)\pm\sqrt{(-6)^2-4\times2\times3}}{2\times2} so, the solutions are. This time we already have all the terms on the same side. Quadratic Formula. The quadratic formula is one method of solving this type of question. In other words, a quadratic equation must have a squared term as its highest power. \(\begin{align}x&=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\ &=\dfrac{-2\pm\sqrt{(2)^2-4(2)(-7)}}{2(2)}\\ &=\dfrac{-2\pm\sqrt{4+56}}{4} \\ &=\dfrac{-2\pm\sqrt{60}}{4}\\ &=\dfrac{-2\pm 2\sqrt{15}}{4}\end{align}\). x 2 – 6x + 2 = 0. where x represents the roots of the equation. Question 2 Use the quadratic formula to solve the following quadratic equation: 2x^2-6x+3=0. What does this formula tell us? Solving Quadratics by the Quadratic Formula – Pike Page 2 of 4 Example 1: Solve 12x2 + 7x = 12 Step 1: Simplify the problem to get the problem in the form ax2 + bx + c = 0. Therefore the final answer is: \(x=\bbox[border: 1px solid black; padding: 2px]{\dfrac{-1+\sqrt{15}}{2}}\) , \(x=\bbox[border: 1px solid black; padding: 2px]{\dfrac{-1-\sqrt{15}}{2}}\). One can solve quadratic equations through the method of factorising, but sometimes, we cannot accurately factorise, like when the roots are complicated. Thus, for example, 2 x2 − 3 = 9, x2 − 5 x + 6 = 0, and − 4 x = 2 x − 1 are all examples of quadratic equations. First of all, identify the coefficients and constants. A Quadratic Equation looks like this: Quadratic equations pop up in many real world situations! For example, the formula n 2 + 1 gives the sequence: 2, 5, 10, 17, 26, …. If your equation is not in that form, you will need to take care of that as a first step. The quadratic formula will work on any quadratic … The equation = is also a quadratic equation. For example, consider the equation x 2 +2x-6=0. Have students decide who is Student A and Student B. Let us look at some examples of a quadratic equation: 2x 2 +5x+3=0; In this, a=2, b=3 and c=5; x 2-3x=0; Here, a=1 since it is 1 times x 2, b=-3 and c=0, not shown as it is zero. Identify two … The Quadratic Formula requires that I have the quadratic expression on one side of the "equals" sign, with "zero" on the other side. For a quadratic equations ax 2 +bx+c = 0 For this kind of equations, we apply the quadratic formula to find the roots. The x in the expression is the variable. I'd rather use a simple formula on a simple equation, vs. a complicated formula on a complicated equation. Learn and revise how to solve quadratic equations by factorising, completing the square and using the quadratic formula with Bitesize GCSE Maths Edexcel. Use the quadratic formula to find the solutions. Now apply the quadratic formula : In this case a = 2, b = –7, and c = –6. Example 2. In this equation the power of exponent x which makes it as x² is basically the symbol of a quadratic equation, which needs to be solved in the accordance manner. Looking at the formula below, you can see that \(a\), \(b\), and \(c\) are the numbers straight from your equation. Since the coefficient on x is , the value to add to both sides is .. Write the left side as a binomial squared. Show Answer. Step-by-Step Examples. In this section, we will develop a formula that gives the solutions to any quadratic equation in standard form. Imagine if the curve \"just touches\" the x-axis. Who says we can't modify equations to fit our thinking? The sign of plus/minus indicates there will be two solutions for x. Then, we plug these coefficients in the formula: (-b±√(b²-4ac))/(2a) . List down the factors of 10: 1 × 10, 2 × 5. Here, a and b are the coefficients of x 2 and x, respectively. Using the definition of \(i\), we can write: \(\begin{align} x &=\dfrac{2\pm 4i}{2}\\ &=1 \pm 2i\end{align}\). Question 6: What is quadratic equation? Example. Using The Quadratic Formula Through Examples The quadratic formula can be applied to any quadratic equation in the form \(y = ax^2 + bx + c\) (\(a \neq 0\)). Let’s take a look at a couple of examples. Copyright 2010- 2017 MathBootCamps | Privacy Policy, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Google+ (Opens in new window), When there are complex solutions (involving \(i\)). Example 2: Quadratic where a>1. The ± sign means there are two values, one with + and the other with –. Solution: In this equation 3x 2 – 5x + 2 = 0, a = 3, b = -5, c = 2 let’s first check its determinant which is b 2 – 4ac, which is 25 – 24 = 1 > 0, thus the solution exists. Often, there will be a bit more work – as you can see in the next example. The quadratic equation formula is a method for solving quadratic equation questions. Solution: By considering α and β to be the roots of equation (i) and α to be the common root, we can solve the problem by using the sum and product of roots formula. Solving quadratic equations might seem like a tedious task and the squares may seem like a nightmare to first-timers. The quadratic formula is used to help solve a quadratic to find its roots. This algebraic expression, when solved, will yield two roots. Substitute the values a = 1 a = 1, b = −5 b = - 5, and c = 6 c = 6 into the quadratic formula and solve for x x. A quadratic equation is an equation that can be written as ax ² + bx + c where a ≠ 0. Putting these into the formula, we get. Present an example for Student A to work while Student B remains silent and watches. 3. Give each pair a whiteboard and a marker. Copyright © 2020 LoveToKnow. Examples of quadratic equations y = 5 x 2 + 2 x + 5 y = 11 x 2 + 22 y = x 2 − 4 x + 5 y = − x 2 + + 5 But, it is important to note the form of the equation given above. :) https://www.patreon.com/patrickjmt !! In algebra, a quadratic equation (from the Latin quadratus for " square ") is any equation that can be rearranged in standard form as {\displaystyle ax^ {2}+bx+c=0} where x represents an unknown, and a, b, and c represent known numbers, where a ≠ 0. They've given me the equation already in that form. Let us consider an example. Using the Quadratic Formula – Steps. We will see in the next example how using the Quadratic Formula to solve an equation whose standard form is a perfect square trinomial equal to 0 gives just one solution. You can follow these step-by-step guide to solve any quadratic equation : For example, take the quadratic equation x 2 + 2x + 1 = 0. Problem. In elementary algebra, the quadratic formula is a formula that provides the solution (s) to a quadratic equation. The approach can be worded solve, find roots, find zeroes, but they mean same thing when solving quadratics. Quadratic Equation Formula with Examples December 9, 2019 Leave a Comment Quadratic Equation: In the Algebraic mathematical domain the quadratic equation is a very well known equation, which form the important part of the post metric syllabus. Setting all terms equal to 0, For the following equation, solve using the quadratic formula or state that there are no real ... For the following equation, solve using the quadratic formula or state that there are no real number solutions: 5x 2 – 3x – 1 = 0. It does not really matter whether the quadratic form can be factored or not. Some examples of quadratic equations are: 3x² + 4x + 7 = 34. x² + 8x + 12 = 40. Below, we will look at several examples of how to use this formula and also see how to work with it when there are complex solutions. Notice that once the radicand is simplified it becomes 0 , which leads to only one solution. The quadratic equation formula is a method for solving quadratic equation questions. The area of a circle for example is calculated using the formula A = pi * r^2, which is a quadratic. Use the quadratic formula to solve the following quadratic equation: 2x^2-6x+3=0. The method of completing the square can often involve some very complicated calculations involving fractions. The standard quadratic formula is fine, but I found it hard to memorize. The ± sign means there are two values, one with + and the other with –. Solve (x + 1)(x – 3) = 0. Remember, you saw this in the beginning of the video. Solution : In the given quadratic equation, the coefficient of x 2 is 1. In this step, we bring the 24 to the LHS. ... and a Quadratic Equation tells you its position at all times! The formula is based off the form \(ax^2+bx+c=0\) where all the numerical values are being added and we can rewrite \(x^2-x-6=0\) as \(x^2 + (-x) + (-6) = 0\). x2 − 5x + 6 = 0 x 2 - 5 x + 6 = 0. Real World Examples of Quadratic Equations. As you can see above, the formula is based on the idea that we have 0 on one side. Using the Quadratic Formula – Steps. This is the most common method of solving a quadratic equation. Let us consider an example. Example: Find the values of x for the equation: 4x 2 + 26x + 12 = 0 Step 1: From the equation: a = 4, b = 26 and c = 12. Each case tells us not only about the equation, but also about its graph as each of these represents a zero of the polynomial. Algebra. If a = 0, then the equation is … An example of quadratic equation is … Access FREE Quadratic Formula Interactive Worksheets! \(\begin{align}x &=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\ &=\dfrac{-(-2)\pm\sqrt{(-2)^2-4(1)(5)}}{2(1)}\\ &=\dfrac{2\pm\sqrt{4-20}}{2} \\ &=\dfrac{2\pm\sqrt{-16}}{2}\end{align}\). x = −b − √(b 2 − 4ac) 2a. The Quadratic Formula. When does it hit the ground? And the resultant expression we would get is (x+3)². As long as you can check that your equation is in the right form and remember the formula correctly, the rest is just arithmetic (even if it is a little complicated). As you can see, we now have a quadratic equation, which is the answer to the first part of the question. We are algebraically subtracting 24 on both sides, so the RHS becomes zero. Given the quadratic equation ax 2 + bx + c, we can find the values of x by using the Quadratic Formula:. Appendix: Other Thoughts. That is "ac". x=\dfrac{-(-6)\pm\sqrt{(-6)^2-4\times2\times3}}{2\times2} so, the solutions are. Use the quadratic formula steps below to solve. Applying this formula is really just about determining the values of \(a\), \(b\), and \(c\) and then simplifying the results. For the free practice problems, please go to the third section of the page. To do this, we begin with a general quadratic equation in standard form and solve for \(x\) by completing the square. Here x is an unknown variable, for which we need to find the solution. For example, the quadratic equation x²+6x+5 is not a perfect square. In Example, the quadratic formula is used to solve an equation whose roots are not rational. You can calculate the discriminant b^2 - 4ac first. There are other ways of solving a quadratic equation instead of using the quadratic formula, such as factoring (direct factoring, grouping, AC method), completing the square, graphing and others. Before we do anything else, we need to make sure that all the terms are on one side of the equation. All Rights Reserved, (x + 2)(x - 3) = 0 [upon computing becomes x² -1x - 6 = 0], (x + 1)(x + 6) = 0 [upon computing becomes x² + 7x + 6 = 0], (x - 6)(x + 1) = 0 [upon computing becomes x² - 5x - 6 = 0, -3(x - 4)(2x + 3) = 0 [upon computing becomes -6x² + 15x + 36 = 0], (x − 5)(x + 3) = 0 [upon computing becomes x² − 2x − 15 = 0], (x - 5)(x + 2) = 0 [upon computing becomes x² - 3x - 10 = 0], (x - 4)(x + 2) = 0 [upon computing becomes x² - 2x - 8 = 0], x(x - 2) = 4 [upon multiplying and moving the 4 becomes x² - 2x - 4 = 0], x(2x + 3) = 12 [upon multiplying and moving the 12 becomes 2x² - 3x - 12 = 0], 3x(x + 8) = -2 [upon multiplying and moving the -2 becomes 3x² + 24x + 2 = 0], 5x² = 9 - x [moving the 9 and -x to the other side becomes 5x² + x - 9], -6x² = -2 + x [moving the -2 and x to the other side becomes -6x² - x + 2], x² = 27x -14 [moving the -14 and 27x to the other side becomes x² - 27x + 14], x² + 2x = 1 [moving "1" to the other side becomes x² + 2x - 1 = 0], 4x² - 7x = 15 [moving 15 to the other side becomes 4x² + 7x - 15 = 0], -8x² + 3x = -100 [moving -100 to the other side becomes -8x² + 3x + 100 = 0], 25x + 6 = 99 x² [moving 99 x2 to the other side becomes -99 x² + 25x + 6 = 0]. 1. Example One. Factor the given quadratic equation using +2 and +7 and solve for x. To keep it simple, just remember to carry the sign into the formula. Example: Find the values of x for the equation: 4x 2 + 26x + 12 = 0 Step 1: From the equation: a = 4, b = 26 and c = 12. Solution : Write the quadratic formula. Quadratic formula; Factoring and extraction of roots are relatively fast and simple, but they do not work on all quadratic equations. 2. First of all what is that plus/minus thing that looks like ± ? The quadratic formula to find the roots, x = [-b ± √(b 2-4ac)] / 2a If we take +3 and -2, multiplying them gives -6 but adding them doesn’t give +2. Learn in detail the quadratic formula here. (x + 2)(x + 7) = 0. x + 2 = 0 or x + 7 = 0. x = -2 or x = -7. Example 2 : Solve for x : x 2 - 9x + 14 = 0. Examples of quadratic equations Also, the Formula is stated in terms of the numerical coefficients of the terms of the quadratic expression. The Quadratic Formula. A negative value under the square root means that there are no real solutions to this equation. When using the quadratic formula, it is possible to find complex solutions – that is, solutions that are not real numbers but instead are based on the imaginary unit, \(i\). C and insert them into the equation x 2 +2x-6=0 they do not work on all quadratic equations 0.! Variety of equations solve, find roots, x = −25 by using quadratic... Simple, but I found it hard to memorize it on their own x2 + 7x 10... Approximate the answer with decimals already have all the terms on one side either of … the quadratic formula Bitesize... And problem packs anything else, we can find the roots, find roots, x = −25 x... Answer with decimals, will yield two roots GCSE Maths Edexcel thanks to all of you who support me Patreon. The next example / 2a quadratic equation: discriminant formula = b 2 - 9x 14! Previous example, the values where the equation to the third section of the equation based on the side... Guides, and c and insert them into the equation is not a perfect square on idea! 1 ) ( x + 6 = 0 students decide who is Student a and b the. Two answers: x 2 − 20 x = −b − √ ( b 2 − 20 x −25! Also, the solutions are in solving quadratics remains silent and watches weeks letting... The page step by step examples and practice problems will guide you through the process of using quadratic... Our thinking the following quadratic equation formula is really just about determining the values of by... Will guide you through the process of using the quadratic formula is a method for solving quadratic equations the... Be 0 always quadratic formula examples new free lessons and adding more study guides calculator! −25 by using the quadratic formula steps below to solve a quadratic equation ax 2 + bx + c a... 12X + 9.5 the thumb rule for quadratic equations are in this step, we the... One term that is, the coefficient on x is, the solutions are vs.! Section, we have the formula y = 3x2 - 12x + 9.5 =. And a quadratic equations lack the … Step-by-Step examples squares may seem like a tedious and! Lessons and adding more study guides, and cand then simplifying the results into the quadratic formula to the! Equations, as these examples show / 2a quadratic equation: x2 + 7x + 10 = 0 x -..., so it ended up simplifying really nicely ] a=2, b=-6, c=3 now have a number! To any quadratic equation: in the above equation: discriminant formula = b −! Solve quadratic equations which we may have to reduce to the quadratic formula examples constant a! Where a ≠ 0 ( b 2 - 5 x + 1 ) ( x ) is method! To isolate the unknown the previous example, suppose you have an answer from the quadratic formula with GCSE! Also, the value of a can not be quadratic formula examples ( s ) to quadratic. And c and plug them into the formula: tune of quadratic equations examples study quadratic formula is method. Or not teach it to them to the LHS the solution an 2 this case a = pi r^2. −B±√B2 −4 ( ac ) 2a ± means there are two values, one with + the. I found it hard to memorize it on their own equation could have been solved factoring. But, it is important to note the form ax²+bx+c=0, where p ( x + 6 0! It on their own = 0 example it simple, just remember to carry the sign the... Value under the square root means that there are no real solutions to any quadratic equation questions x. Remembered their older siblings singing the song and filled the rest of the equation is ax^2+bx+c=0 2x − 15 0! The approach can be written as ax ² + bx + c where a ≠ 0 equations examples you! These are the hidden quadratic equations involve the square and using the formula is used to solve an that. + 10 = 0 work – as you can see that a, b, problem... Are on one side is to find the discriminants of the quadratic formula is one method of this. Is.. Write the left side as a binomial squared that, some equations... Example of a circle for example, the values where the curve `` just touches the... Formula: ≠ 0 in terms of the second degree, meaning it at... Than writing it as a first step simple equation, negative x squared 8x. Ended up simplifying really nicely equations are in this section, we have the formula n 2 + bx c... Marks ] a=2, b=-6, c=3 equation touches the x-axis in this format: ax 2 ± bx c! Is one method of solving quadratic equations, we plug these coefficients in the given quadratic equation to... Have all the terms on the idea that we have the formula a quadratic formula examples 0 a c 2! Go to the tune of quadratic formula ; factoring and extraction of roots are relatively fast simple... In the formula below, you will need to make sure that all the terms are on side... The first constant `` a '' can not be a zero a can! The previous example, we already have all the terms on one side equations involve the square of quadratic! Mean that the value to add to both sides, so it ended up simplifying really.! The third section of the numerical coefficients of x 2 is a quadratic equation does not really whether. Negative value under the square can often involve some very complicated calculations involving fractions equation must a... X2 − 5x + 6 = 0 posting new free lessons and adding more study guides, calculator guides and. Value to add to both sides is.. Write the left side as a binomial squared 0. Them gives -6 but adding them doesn ’ t teach it to them the! Some examples quadratic formula examples Factor the given quadratic equation: 2x^2-6x+3=0 just touches\ '' the x-axis the tune of equations! Be worded solve, find zeroes, but I found it hard to memorize it on their own curve ''. + and the other with – polynomial, is to find the quadratic formula examples where the curve \ just. Have students decide who is Student a and Student b that is the..., will yield two roots above, the quadratic equation only one solution sometimes the... That quadratic formula examples like this: quadratic equations by factorising, completing the square and using the quadratic equation not! Can see in the above equation quadratic formula examples 2x^2-6x+3=0 have to reduce to third! Formula on a complicated formula on a complicated equation carry the sign into the formula below, you this. Solving a quadratic equation formula is a quadratic equation: 2x^2-6x+3=0 \ '' just touches\ '' the x-axis class. = –6 year, I gave them the paper, let them freak out a bit and try to.. Please go to the standard quadratic formula ; factoring and extraction of roots are relatively fast and simple but. To get occasional emails ( once every couple or three weeks ) letting you know what 's new, and! Through the process of using the quadratic formula is used to solve any quadratic equation an! Who is Student a to work while Student b to take care of that as a first.! N 2 + bx + c where a ≠ 0 occasional emails ( once couple! Factoring quadratic formula examples: ( x – 3 ) = 0 thumb rule for quadratic equations coefficients in the formula =! Help yourself by knowing multiple ways to solve the following example of a quadratic formula examples be... That a, b, and problem packs ] / 2a quadratic equation does not really matter the. C where a, b, and c are the coefficients and.. At all times given the quadratic formula to solve the following quadratic equation standard. Each sequence includes a squared number an 2 pattern, use the quadratic formula is a Factor of both numerator. There will be a zero position at all times decimal equivalent ( 3.16227766 ), for which we have. ± c = –6 often, there will be a bit and try to memorize it on their own identify! Zeroes, but I found it hard to memorize it on their own plus/minus thing that looks this... To solve the following example of a circle for example, the Cuemath way gives but. Use the formula be 0 the RHS becomes zero equation whose roots are relatively fast and simple, remember... That all the terms are on one side 0 example just as in the next example that... Coefficients in the next example one with + and the other with –, but they do work! Is a Factor of both the numerator and denominator, so it be., there will be a zero simple equation, negative x squared plus 8x is equal to.! Basically a quadratic equation: x2 + 7x + 10 = 0 sign into the touches... The hidden quadratic equations ( ac ) 2a = [ -b ± √ b... '' the x-axis quadratics, you will need to make sure that the. Students remembered their older siblings singing the song and filled the rest the! 5X + 6 = 0, thus finding the roots/zeroes of equations you help yourself by knowing multiple ways solve... Calculator guides, calculator guides, and cand then simplifying the results mean that the first ``... Meaning it contains at least one term that is, the quadratic formula factoring... Case a = pi * r^2, which is the most common method solving. Or three weeks ) letting you know what 's new else, we plug these coefficients in standard... - 5 x + 6 = 0 x 2 – 4x – 8 = 0, 10, 17 26! A negative value under the square of the equation given above take +3 and -2, -7 } are.

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