Question

Simplify. remove grouping sbols and combine like terms

Answer 1

`5a^2+12b^2-40b`

Explanation:

First distribute the -4 to the 2b and -3b. This leaves you with
`5a^2-8b+12b(b+4)`

Now you can distribute the 12b to b and +4. This leaves you with
`5a^2-8b+12b^2+48b`

Now you can combine your like terms leaving you with
`5a^2+12b^2-40b`.