Question

How much is `(4x^2 - 6x + 7) + (-19x^2 - 15x - 18)`?

Answer 1

`-15x^2-21x-11`

Explanation:

`(4x^2-6x+7)+(-19x^2-15x-18)`

Remove the parentheses because they are unnecessary. Then gather like terms.

`4x^2-6x+7-19x^2-15x-18` `=`

`4x^2-19x^2-6x-15x+7-18` `=`

`-15x^2-21x-11`