Question

Solve x^2-49=0 by using quadratic formula

Answer 1

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${x}^{2} - 49 = 0$

${x}^{2} = 49$

${x}^{2} = {7}^{2}$

$x = + 7 \\ x = - 7$

Ans..

Or..

$(x + 7)( x - 7) = 0$

$x + 7 = 0 .....(1)\\ x - 7 = 0......(2)$

$x = + 7.....(1) \\ x = - 7....(2)$

Ans....

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