SOLUTION: 3a2(a – b) – 6a(a – b) + 21(a – b)Factor out the binomial

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Question 442758: 3a2(a – b) – 6a(a – b) + 21(a – b)Factor out the binomial
Answer by rwm(914) About Me  (Show Source):
You can put this solution on YOUR website!
3a2(a – b) – 6a(a – b) + 21(a – b)
immediately we can see that a-b can be factored out.
(a-b)*(3a^2-6a+21)
we can also factor out 3
3*(a-b)*(a^2-2a+7)