Asked by Cassie

Factor.

15x^4 - 18x^3 + 21x^2 - 9x

The method that I usually use did not seem to work... so I'm not sure if I messed up or not. Please help if you can and explain how you did it!

Thank you! :-)
Answered by Bob
The only thing that can be factored out is 3x because that's what all of the terms have in common - they're multiples of 3x. So the answer is:

3x(5x^3 - 6x^2 + 7x - 3)
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