Root of quadratic equation $x^{2} + 5 x - 14 = 0$ is

- 2

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- 7

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3

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None of these

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Solution

The correct option is A $- 7$
Given equation is $x^{2} + 5 x - 14 = 0$
$\Rightarrow x^{2} + 7 x - 2 x - 14 = 0$
$\Rightarrow x (x + 7) - 2 (x + 7) = 0$
$\Rightarrow (x - 2) (x + 7) = 0$
This implies $x = 2$ and $x = - 7$ .

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