Question

Factorizar:
x^2-3x-40
6x^2-17x+10
x^4-10x^2+16
9x^2+24x+15

Answer 1

1) (x-8)(x+5)
2) (6x-12)(x-5)
3) x^4=t^2, x^2=t
t=8 ó t=2
(t-8)(t-2)
(x^2-8)(x^2-2)
4) 9((x+1)(x+5/3))