You can put this solution on YOUR website! it's a "quadratic", to solve move everything to one side:
a^2=-27-12a
a^2+12a=-27
a^2+12a+27=0
factor the left:
(a+3)(a+9) = 0
a = {-3, -9}
You can put this solution on YOUR website! a^2=-27-12a
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Rearrange:
a^2+12a+27 = 0
Factor:
a^2+3a+9a+27 = 0
a(a+3)+9(a+3) = 0
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Factor:
(a+3)(a+9) = 0
a = -3 or a = -9
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Cheers,
Stan H.
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