Question 1014422
x^2+2x-8=0 
Factors into (x+4)(x-2)=0; x=-4, 2
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quadratic 
x=(1/2)(-2 +/- sqrt (4+32)=
(1/2) (-2+/-6)=(1/2)(-8) and (1/2)(4)=-4,2
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graph
{{{graph(300,200,-10,10,-10,10,x^2+2x-8)}}}