SOLUTION: Factor each expression. Find a value for k so that 9m^2-kn^2 will have the factors 3m+7n and 3m-7n. Thanks

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Question 117239: Factor each expression.

Find a value for k so that 9m^2-kn^2 will have the factors 3m+7n and 3m-7n.
Thanks

Answer by checkley71(8403)   (Show Source): You can put this solution on YOUR website!
9M^2-KN^2=(3M+7N)(3M-7N)=9M^2-49N^2
THEREFORE K=49

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