how do you factor 42x^3-30x^2+7x-5 by grouping?

I need help on how to factor by grouping, i do not understand this at all.
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1 Answer

how do you factor 42x^3-30x^2+7x-5 by grouping?

42x^3 - 30x^2 + 7x - 5

You should notice that 42 and 30 are the same multiple of 7 and 5. This shows you how to group the terms.

42x^3 + 7x - 30x^2 - 5

7x(6x^2 + 1) - 5(6x^2 + 1)

(6x^2 + 1)(7x - 5)

by Level 11 User (81.5k points)

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