Question

Help please I don’t know what to do

Answer 1

The answer is letter B

Step-by-step explanation

Simply combine like terms in which

-2x^2 + 7x^2 = 5x^2

8x + 4x = 12x

-9 + 2 = 7

So we come up with the answer of the option letter B

Answer 2

B

Explanation:

Combine Like terms