SOLUTION: Can someone help me solve this problem, please? 20x^3-28x^2+45x-63 Factor by grouping. Thank you.

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Question 123641: Can someone help me solve this problem, please?
20x^3-28x^2+45x-63 Factor by grouping.
Thank you.
Found 2 solutions by nadinadan, edjones:
Answer by nadinadan(32) About Me  (Show Source):
You can put this solution on YOUR website!
We group first 2 numbers and the other 2 number left.
4x^2(5x-7)+9(5x-7)= (5x-7)(4x^2+9) is the solution.

Answer by edjones(7311) About Me  (Show Source):
You can put this solution on YOUR website!
20x^3-28x^2+45x-63
=4x^2(5x-7)+9(5x-7)
=(4x^2+9)(5x-7)