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Solving a Quadratic Equation by Factorization Method

The roots of ...

Question

The roots of the equation $x^{2} + 5 x - 24 = 0$ :

3, 8

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- 3, - 8

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- 3, 8

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- 8, 3

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Solution

The correct option is B $- 8, 3$
Given, $x^{2} + 5 x - 24 = 0$

$x^{2} + 8 x - 3 x - 24 = 0$

$x (x + 8) - 3 (x + 8) = 0$

$(x + 8) (x - 3) = 0$

$x = - 8, 3$

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