# How do you simplify the square root of 18 minus the square root of 50?

##### 1 Answer

Jul 25, 2015

You check to see what you can extract from those radicals.

#### Explanation:

You expression looks like this

Write the *prime factors* of these two numbers to see if you can find write tham as products of a *perfect square* and another number

You can thus write, with the help of the *product property of radicals*, an equivalent expression that looks like this

Finally, you get