Question

What is `(-10z^4 + 5u) - (-2z^4 - 8u)`?

Answer 1

`13u - 8z^4`

Explanation:

first step: remove the brackets :

`- 10z^4 + 5u + 2z^4 + 8u`

step 2: collect like terms : 13u -`8z^4`