Question

Factor by grouping.
72x^3 - 56x^2 + 45x - 35

Answer 1

`(8x^(2) +5)(9x-7)`

Explanation:

`72x^(3)-56x^2+45x-35`

Out of 72x^3 and 56x^2 you can factor 8x^2

Out of 45x and -35 you can factor 5

So if you put those together you get 8x^2+5

8x^2*9x=72x^3 and 8x^2*-7= -56x^2

5*9x=45x and 5*-7= -35