SOLUTION: I need help with factor by grouping: 15*x^3-40*x^2+21*x-56=

SOLUTION: I need help with factor by grouping: 15x^3-40x^2+21*x-56=

Algebra.Com

Question 462667: I need help with factor by grouping:
15*x^3-40*x^2+21*x-56=
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
factor by grouping:
15*x^3-40*x^2+21*x-56
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= 5x^2(3x-8) + 7(3x-8)
------
= (3x-8)(5x^2+7)
===================
Cheers,
Stan H.
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