SOLUTION: solve: c^2+3c-54=0 help?

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Question 375778: solve:
c^2+3c-54=0
help?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi,
solving
c^2+3c-54=0
factoring
(c+9)(c-6)=0 Note:SUM of the inner product(9c) and the outer product(-6c) = 3c
(c+9)=0
c = -9
(c-6)=0
c = 6