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OpenStudy (anonymous):
Solve the equation: x^2+18x+81=25
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OpenStudy (uri):
x^2+18x+81=25 x^2+18x=25-81 x^2+18x=-56 x^2+18x+56 =0
OpenStudy (uri):
Now do we have to use Quad formula?
OpenStudy (anonymous):
18^2-4*56=324-224=100 ,then delta =10 , x1=-18+10/2=-4 , x2 =-18-10/2=-14
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