This lesson will talk about the meaning of rationalizing the denominator, identify a few reasons why it is done, and will provide some specific learning points on how to accomplish the task.

This is considered to be part 1 where we are only dealing with monomial (single term) denominators. Another lesson will deal with binomial denominators. You can find this lesson here:

https://mathpqjq.com/rationalizing-the-denominator-using-conjugates/