Question

Add: (3x2 - 5x + 6) + (9 - 8x - 4x2) A) 12x2 - 13x + 2 B) 7x2 + 3x - 3 C) 7x2 - 13x + 15 D) -x2 - 13x + 15

Answer 1

D

Explanation:

So we have the expression:

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

Combine like terms:

`=(3x^2-4x^2)+(-5x-8x)+(6+9)`

Add or subtract:

`=(-1x^2)+(-13x)+(15)`

Simplify:

`=-x^2-13x+15`

Our answer is D