Question

How do you simplify `(-2y^2-4y+7) - (2y^2+4y-7)`?

Answer 1

`(-2y^2-4y+7)-(2y^2+4y-7)`
`color(white)("XXXX")` `=-4y^2-8y+14`

Explanation:

`(-2y^2-4y+7)-(2y^2+4y-7)`

`color(white)("XXXX")` `=(-2y^2-4y+7)+(-2y^2-4y+7)`

`color(white)("XXXX")` `=2(-2y^2-4y+7)`

`color(white)("XXXX")` `= -4y^2-8y+14`