SOLUTION: Factor Completely {{{3(x+1)^2-9(x+1)-12}}}

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Question 726671: Factor Completely
3%28x%2B1%29%5E2-9%28x%2B1%29-12
Found 2 solutions by mananth, tanjo3:
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
3%28x%2B1%29%5E2-9%28x%2B1%29-12
let (x+1)=a
3a%5E2-9a-12

3a%5E2-12a%2B3a-12
3a%28a-4%29%2B3%28a-4%29
%28a-4%29%283a%2B3%29
3%28a-4%29%28a%2B3%29
re substitute
3%28x%2B1-4%29%28x%2B1%2B3%29
3%28x-3%29%28x%2B4%29

Answer by tanjo3(60) About Me  (Show Source):