1. Quick Crisp Review Complex Numbers Conjugates What happens when you multiply conjugates?

2. You will be able to simplify expression that contain complex numbers.

3. To figure out where we are in the cycle divide the exponent by 4 and look at the remainder. Graphing Complex Numbers on the Complex Plane: Graph 3 + 4i

4. We use the complex conjugate to rationalize a fraction that has a complex number in the denominator. Example: Example 2: Multiply the numerator and denominator by i because the denominator is not a binomial expression

5. You try it! a) b)

6. Exit How is dividing complex numbers similar to rationalizing a denominator that has a square root? ACT If x 2 + 6x + 8 = 4 + 10x, then x equals which of the following? A) -2B) -1C) 0D) 1 E) 2