Question

(5x^2-3x+7) + (-5x^2+3x-7)

Answer 1

0

Explanation:

Combine like terms, combining 5x^2 and - 5x^2, -3x and 3x, etc. to get:

5x^2 - 5x^2 - 3x + 3x - 7 + 7.

These numbers are opposites, so they cancel out, and what we are left with is just 0.