SOLUTION: Factor by grouping 7b^3-6b^2+21b-18

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Question 672968: Factor by grouping 7b^3-6b^2+21b-18
Answer by MathLover1(20849) About Me  (Show Source):
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7b%5E3-6b%5E2%2B21b-18..rearrange the terms

7b%5E3%2B21b-6b%5E2-18..... group

%287b%5E3%2B21b%29-%286b%5E2%2B18%29

7b%28b%5E2%2B3%29-6%28b%5E2%2B3%29

%287b-6%29%28b%5E2%2B3%29