SOLUTION: how would you solve this problem: x^3+x^2-225x-225=0

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Question 677724: how would you solve this problem: x^3+x^2-225x-225=0
Answer by pmatei(79) About Me  (Show Source):
You can put this solution on YOUR website!
Start by factoring x%5E2 from the first two terms and -225 from the last two terms:
x%5E2%28x%2B1%29-225%28x%2B1%29=0
Factor the parenthesis %28x%2B1%29:
%28x%5E2-225%29%28x%2B1%29=0
%28x%2B15%29%28x-15%29%28x%2B1%29=0
Each parenthesis could be zero, so solutions are:
x+=+-15
x+=+15
x+=+-1