As we continue to explore the use of *i* to represent the square root of -1, and the consequences that such a definition involves, we revisited the topic of rationalizing today, and noted that since *i* is a square root, the rules of Simplest Radical Form require that we not leave *i* in the denominator of a fraction.

Our test on Unit 4 will be on **Friday, January 18th**. Please do not be absent on that day! If you know for some reason that you will be absent on that day, please arrange a time **before the 18th** to take the test! Otherwise, we will have to schedule a time for you to take the test during exam week.

## Today’s Files

- Notes
- HW 4.11 – Rationalizing Imaginary Denominators
- Lesson Video (you can stop watching this video at the 8-minute mark. The examples he does beyond that point are beyond what we will do in this class)
- Video Archive