1. 2x^3 - 6x - 20
2. 2x^2 - 6x - 20
3. 2x^3 - 16
1. 2x^3 - 6x - 20
2. 2x^2 - 6x - 20
3. 2x^3 - 16
1. $2x^3 - 6x - 20$ =
= $2(x^3+3x-10)$
2. $2x^2 - 6x - 20$
= $(x^2-3x-10)$ =
= $2(x+2)(x-5)$
3. $2x^3 - 16$
= $2(x^3-8)$ =
= $2(x^2+2x+4)(x-2)$