(4x^2-2x-1)-(-3x^3+2)

I already know the answer is 3x^3+4x^2-2x-3 but I need someone to explain how to get to the solution. It would be greatly appreciated.

3 answers

Combine like terms.

3x^3 (this is a positive because two negatives = a positive
3x*2
-2x
-2 + - 1 = -3
Thank you!
You're welcome.