To find the answer, take out factors of 96 and simplify, like this:
96
Two factors that work nicely are 6 and 16
Now, you simplify from here.
The square root of 16 is 4
The square root of 6 is not a nice number, because 6 is not a perfect square.
So, you would simply leave it as:

The 4 is from when you simplified the square root of 16 before. You put that number on the outside.