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April 17, 2014

Homework Help: mat 117/algebra

Posted by Diana on Tuesday, June 26, 2007 at 10:03pm.

Find a value for k so the 9m^2-kn^2 will have the factors 3m + 7n and 3m -7n. Please show me how to get this and show the work please.

Use that (a-b)(a+b) = a^2 - b^2

So, you can read-off that k = 49.

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