SOLUTION: how do you factor a problem such as: a-squared - b-squared + 6b - 9?

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Question 51648: how do you factor a problem such as: a-squared - b-squared + 6b - 9?
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Factor: a%5E2-b%5E2%2B6b-9
Try this:
%28a%2Bb-3%29%28a-b%2B3%29