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

Algebra ->  Polynomials-and-rational-expressions -> 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      Log On


   

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) About Me  (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