Question

How to do this :
2u3-3u2-17u+30

Answer 1

$2u ^{3} - 3u^{2} - 17u + 30 \\ = 2 {u}^{3} - 4 {u}^{2} + {u}^{2} - 2u - 15u + 30 \\ = 2 {u}^{2} (u - 2) + u(u - 2) - 15(u - 2) \\ = (2u ^{2} + u - 15)(u - 2)$
Hope it help you.