Question

How do you simplify 4 square root of 27 - square root of 75?

Answer 1

First get some squares out from under the root

Explanation:

`27=3^2*3->sqrt27=sqrt(3^2)*sqrt3=3sqrt3`

`75=5^2*3->sqrt75=sqrt(5^2)*sqrt3=5sqrt3`

Answer:

`4sqrt27-sqrt75=4*3sqrt3-5sqrt3=7sqrt3`