Question

May somebody help me please

Answer 1

add 3+4=7x². -4-5=-9x. 7-12=-5. Answer : A

Answer 2

Hi there!

Answer:

A. 7x² - 9x - 5

Explanation:

If you simply take away the parentheses, you get:

3x² - 4x + 7 + 4x² - 5x - 12

Then, just add them all together, and you get:

A. 7x² - 9x - 5

Let me know if you have any questions!