Question

Combine like terms.

(-3y2 - 7y - 9) - (4y2 + 6y + 9)

A. y2 - y

B. -9y2 - 11y - 18

C. 7y2 + 13y + 18

D. -7y2 - 13y - 18

Answer 1

(-3y2 - 7y - 9) - (4y2 + 6y + 9)


remove the parantheses

-3y^2 - 7y - 9 + 4y^2 + 6y + 9


combine like terms


y^2 - y


A is the correct answer. :)

Answer 2

The answer is D.

-7y2 - 13 y - 18