21b3-7b2 12b-4 helppppppp

Algebra
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21b3-7b2 12b-4

Dec 18th, 2014

21b^3 - 7b^2 + 12b - 4 = 21b^3 - 7b^2 + 12b - 4

 = 7b^2(3b - 1) + 4(3b - 1)

  = (3b - 1)(7b^2 + 4)   

Thank you!!

Dec 18th, 2014

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