Question

How do you simplify `sqrt72-sqrt8+sqrt128`?

Answer 1

`12sqrt(2)`

Explanation:

We'll just simplify each square root individually to start out:

`sqrt(72) = 3sqrt(8) = 6sqrt(2)`

`sqrt(8) = 2sqrt(2)`

`sqrt(128) = 8sqrt(2)`

So the answer is:
`6sqrt(2) - 2sqrt(2) + 8sqrt(2) = 12sqrt(2)`