Question

How do you multiply `(-6sqrt3)(-2sqrt15)`?

Answer 1

I found: `36sqrt(5)`

Explanation:

You can first multiply the numbers outside AND inside the roots:
`(-6)*(-2)sqrt(3*15)=12sqrt(45)=`
Then manipulate inside the root:
`=12sqrt(5*9)=`
Take out `9` from the root as `3`:
`=12*3sqrt(5)=36sqrt(5)`