SOLUTION: I need some help with this problem please. Find a value for k so that 9m^2 - kn^2 will have the factors 3m + 7n and 3m - 7n. I am not sure how to solve this can you help?

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I need some help with this problem please. Find a value for k so that 9m^2 - kn^2 will have the factors 3m + 7n and 3m - 7n. I am not sure how to solve this can you help?       Log On


   

Question 95948: I need some help with this problem please.
Find a value for k so that 9m^2 - kn^2 will have the factors 3m + 7n and 3m - 7n.
I am not sure how to solve this can you help? Thank you.
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
The last integer of both factors is 7. Then k has to equal 7*7 or 49.