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OpenStudy (anonymous):
Solve. x2 + 10x = -21
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OpenStudy (anonymous):
IS that x^2 or 2x?
OpenStudy (anonymous):
x^2
OpenStudy (anonymous):
You need to use the quadratic formula....x^2+10x+21=0
OpenStudy (anonymous):
x^2+10x+21 factor: (x+7)(x+3)=0 x=-7, -3 You don't have to do the quadratic formula in this case because it is factorable.
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