Solve by factoring.

a$)2x^3+3x^2-5x-6=0$

b$)2x^3-11x^2+12x+9=0$

c$)9x^3+18x^2-4x-8=0$

d$)5x^3-8x^2-27x+18=0$

e$)8x^4-64x=0$

f$)4x^4-2x^3-16x^2+8x=0$

g$)x^4-x^3-11x^2+9x+18=0$