SOLUTION: Find a value for k so that 9m^2- kn^2 will have the factors 3m + 7n and 3mn -7n. I am confussed can someone lend me some help please. Thanks.

Question 70542This question is from textbook Beginning Algebra
: Find a value for k so that 9m^2- kn^2 will have the factors 3m + 7n and 3mn -7n.
I am confussed can someone lend me some help please. Thanks. This question is from textbook Beginning Algebra

Answer by funmath(2933) (Show Source): You can put this solution on YOUR website!
Find a value for k so that 9m^2- kn^2 will have the factors 3m + 7n and 3mn -7n.
The difference of perfect squares factor like this:

b^2=b*b
so:

Happy Calculating!!!!
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