Respuesta :

tchen0078
56 + x - x^2
-x^2 + x + 56 Rewrite
x^2 - x - 56 Multiple whole equation by -1 to get positive x^2
(x-8)(x+7) Factor(-8 times 7=56, -8+7=-1)
x=8 x=-7 Put it equal to 0

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