# What is the Square root of 20 - square root of 45 + 2 square root of 125?

##### 1 Answer

Sep 19, 2015

#### Answer:

#### Explanation:

Use prime factorization to make it easier findthe perfect squares that can be taken out from the radical sign.

Then, take out the perfect squares and simplify them:

Finally, add the terms together to get the solution: