Question

Add: (3x^2-5x+6)+(-4x^2-8x+9)

A. -x^2-13x+15
B. 7x^2-13x+15
C. -x^2-13x+3
D. 7x^2+3x-3

Answer 1

A. -x^2-13x+15

Explanation:

-4x^2 + 3x^2 = -x^2

-8x + -5x = -13x

6 + 9 = 15

-x^2-13x+15