Rationalizing a Denominator
When a fraction has an as its denominator, it's convenient to rationalize it.
This example number can be rationalized by eliminating the radical from the denominator and simplifying the fraction.
Expand the fraction with the denominator
To get rid of the in the denominator, the numerator and the denominator are multiplied by that radical.
The fraction can now be simplified.
The fraction has now been rationalized because the denominator is a .