Question 1092668
9m^2-1
I know the answer is (3m^2-1)(3m+1)
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Close, but it's 9m^2-1
I know the answer is (3m-1)(3m+1)
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(3m-1)(3m+1) = 3m*(3m+1) - 1*(3m+1)
= 9m^2 + 3m  - 3m - 1
= 9m^2 - 1
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a^2 - b^2 = (a-b)*(a+b)