Answer:
-5x^3 +11x^2-2
Step-by-step explanation:
(8x^2 − 1 + 2x^3) − (7x^3 − 3x^2 + 1)
Distribute the minus sign
(8x^2 − 1 + 2x^3) − 7x^3 + 3x^2 - 1
I like to line them up vertically from largest to smallest
2x^3 + 8x^2 − 1
− 7x^3 + 3x^2 - 1
-----------------------------
-5x^3 +11x^2-2
