# Math Help - Square Root in Denominator

1. ## Square Root in Denominator

Why is a radical not allowed in the denominator of a fraction?

2. It's not not allowed. But it became a standard to rationalize the denominator because back in the day, it was easier to deal with a rational denominator than an irrational one.

3. ## ok...

Originally Posted by Chop Suey
It's not not allowed. But it became a standard to rationalize the denominator because back in the day, it was easier to deal with a rational denominator than an irrational one.
Is there a mathematical reason?