Question

How do you factor `3x^3 + 9 x^2- 12x-36`?

Answer 1

`3(x+3)(x+2)(x-2).`

Explanation:

`3x^3+9x^2-12x-36,`

`=3{ul(x^3+3x^2)-ul(4x-12)},`

`=3{x^2(x+3)-4(x+3)},`

`=3(x+3){x^2-2^2},`

`=3(x+3)(x+2)(x-2).`