SOLUTION: How do factor this polynomial (x+2y)^2-9

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Question 923543: How do factor this polynomial
(x+2y)^2-9
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
It's not a polynomial but you can factor it.
It's the difference of two squares.
%28x%2B2y%29%5E2-3%5E2=%28x%2B2y%2B3%29%28x%2B2y-3%29