If you are presented with a radical expression having a binomial in the denominator, the conjugate is needed.  Watch this lesson to find out what a conjugate is all about and how we use it to rationalize the denominator.

If you have not seen the previous lesson on Rationalizing the Denominator – Part 1, that deals with monomial denominators, it would be a good idea to check that one out before watching this lesson. It can be found at:

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