Question

How do you simplify `-3(-ab^2)^3`?

Answer 1

`=3a^color(green)(3)b^6`

Explanation:

`-3(-ab^2)^color(green)(3`

Here the power `color(green)(3` needs to be multiplied with each term within brackets:
`-3(-a^color(green)(3)b^(2 . color(green)( 3)))`
`-3.(-a^color(green)(3)b^6)`
`=3a^color(green)(3)b^6`