Question

How do you subtract `7x^2+4x-9` from `5x^2+10x-5`?

Answer 1

`-2x^2+6x+4`

Explanation:

Subtract the like terms as described below:

`5x^2+10x-5` - `(7x^2+4x-9)`

Opening the bracket and we get:

`5x^2+10x-5-7x^2-4x+9`

`(5x^2-7x^2) + (10x-4x) + (-5+9)`

`-2x^2+6x+4`