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Mathematics 7 Online
OpenStudy (anonymous):

Factor the polynomial if possible. If the polynomial cannot be factored, write prime. 20x^3 - 45xy^2

OpenStudy (skullpatrol):

Any ideas?

OpenStudy (anonymous):

A) (2x + 3y)(2x - 3y) B) (5x - 9y)(5x + 9y) C) 5x(2x + 3y)(2x - 3y) D) Prime

OpenStudy (skullpatrol):

Those are not your ideas, they are the answer choices. I want to know what you would do to factor:$$20x^3 - 45xy^2$$

OpenStudy (skullpatrol):

Factor out the greatest monomial factor first.

OpenStudy (anonymous):

Factor out 5x from 20x^3 - 45xy^2

OpenStudy (skullpatrol):

Yes, and what do you get?

OpenStudy (anonymous):

that's where I get stuck

OpenStudy (skullpatrol):

5x times "what" equals 20x^3

OpenStudy (skullpatrol):

First take 5 out of 20, then take x out of x^3

OpenStudy (skullpatrol):

5 times "what" equals 20? x times "what" equals x^3

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