PLSSSSSS I NEED HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Simplify the Expression: \sqrt{9a^(2) }, if a<0

Question

PLSSSSSS I NEED HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Simplify the Expression:


`\sqrt{9a^(2) }`, if a<0

Answer 1

`\sqrt{9a^(2)}=√(9)\sqrt{a^(2)}=3|a|`

As
`a < 0`,
`|a|=-a`, so
`3|a|=\boxed{-3a}`