Question

How do you combine `(-18x^2 + 4x - 16) - (15x^2 + 4x - 13)`?

Answer 1

`-18x^2 + 4x - 16 - 15x^2 -4x + 13`

Combining like terms
`=color(blue)(-18x^2 - 15x^2 + color(blue)(4x - 4x) - color(blue)(16 +13`

`=color(blue)(-33x^2 + 0 -color(blue)(3))`
`=-33x^2 -3`