# How can you simplify #1/(3sqrt(1-x^2/9))#?

##### 1 Answer

Nov 28, 2014

note: This question comes originally from this page.

To simplify this expression I brought the

**1.)**

is equivalent to

**2.)**

A common law of radicals is the law of "combining," which basically looks like:

where

Using this law we can simplify our expression a little further.

**2.)**

will become:

**3.)**

Now, all that's left is to distribute the

**4.)**

which looks a lot less ugly than what we started with in **1** .