Question

Simplify the sum. (8u^3+8u^2+6)+(4u^3-6u+3)​

Answer 1

`\boxed{12u^3+8u^2-6u+9}`

Explanation:

`(8u^3+8u^2+6)+(4u^3-6u+3) = 8u^3+8u^2+6+4u^3-6u+3`

Once

`8x+4x = 12x, \text{ as } x = u^3`

`8u^3+8u^2+6+4u^3-6u+3 = 12u^3+8u^2+6-6u+3 = \boxed{12u^3+8u^2-6u+9}`

You don't need to factor.