7. Factoring

Factor completely.

$15a^2+25a-40$

Factor completely.

$2x^2+9x+9$

Factor completely.

$-6x^2+17x+3$

Factor the following polynomial

$6x^3+9x^2-15x$

Factor the following polynomial

$2x^2+7xy+3y^2$

Factor the following using trial and error.

$3y^2-14y+8$

Factor the following using trial and error.

$8a^2-22a+15$