SOLUTION: How do I solve this? factor u^2-81v^2.

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Question 333418: How do I solve this? factor u^2-81v^2.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the difference of two "perfect" squares factors to the sum and difference of the square roots

(u + 9v)(u - 9v)