Question 114234
Find a value for k so that 9m squared - kn squared will have the factors 3m + 7n and 3m - 7n
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If they are factors:
9m^2-kn^2 = (3m+7n)(3m-7n)
9m^2-kn^2 = 9m^2-49n^2
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-k = -49
k = 49
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Cheers,
Stan H.