SOLUTION: factor 3a^2(a-b)-6a(a-b)+21(a-b)

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Question 85148: factor
3a^2(a-b)-6a(a-b)+21(a-b)
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
First, take out all the common factors, which would be 3(a-b)

3a^2(a-b)-6a(a-b)+21(a-b)
3(a-b) * ( a^2 -2a + 7)

Since the trinomial does not factor, this is the final answer.

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