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Find the value of x : x ^ { 2 } + 2 x - 7

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Find the value of $x$ : $x^{2} + 2 x - 7$

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Find the value of

x

x^{2} + 2 x - 7

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Text solutionVerified

Given,

x^{2} + 2 x - 7 = 0

a = 1, b = 2, c = - 7

x = \frac{- b \pm b ^{2} - 4 a c}{2 a}

x = \frac{- 2 \pm 2 ^{2} - 4 ( 1 ) ( - 7 )}{2 ( 1 )}

= \frac{- 2 \pm 4 2}{2}

= - 1 \pm 22

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