Question

How do you simplify `(-8x^3+4x^2-6x+9) + (15x^3+3x^2-8x-17)`?

Answer 1

By adding like powers (the brackets in the problem have no function):

`(-8+15)x^3+(4+3)x^2+(-6-8)x+(9-17)`

`=7x^3+7x^2-14x-8`