Question

Remove all perfect squares from inside the square root. Assume b is positive

Answer 1

4b
`√(5)`

Explanation:

Factor 80
`b^(2)`.

80
`b^(2)` = 4 * 4 * 5 * b * b

Since there are two 4s and bs, they can be taken out of the square. (Because if you put a square root over 4 squared or b squared, you would get 4 or b.)

Now you are left with 4b
`√(5)`.