Question

Q # 7 combine like terms please

Answer 1

We have this expression:


`(-3y^2-7y-9)-(4y^2+6y+9)`

So let's solve this problem step by step. We need to order this expression. The way we choose is to match equal variables with equal exponents.

So combining like terms we have:


`(-3y^2-7y-9)-(4y^2+6y+9)`

Applying distributive property in the second parenthesis:


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

Grouping terms:


`(-3y^2-4y^2)+(-7y-6y)+(-9-9)`

Finally, adding and subtracting algebraic expressions:


`\boxed{-7y^2-13y-18}`

D. That is the correct answer