SOLUTION: Can you please explain how to factor this trinomial? r^3+2r^2-15r? I have tried and this is what I come up with but I don't think it is correct because it does not check out: r^

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Can you please explain how to factor this trinomial? r^3+2r^2-15r? I have tried and this is what I come up with but I don't think it is correct because it does not check out: r^      Log On


   



Question 237791: Can you please explain how to factor this trinomial? r^3+2r^2-15r? I have tried and this is what I come up with but I don't think it is correct because it does not check out:
r^3-2r^2-15r
LCM=-3r,2r
(r^2-2r)(r-3r)

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Can you please explain how to factor this trinomial?
r^3+2r^2-15r
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Common factor: r
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= r(r^2 + 2r - 15)
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= r(r+5)(r-3)
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Cheers,
Stan H.