1. 5.6 Complex Numbers

2. Solve the following quadratic: x 2 + 1 = 0 Is this quadratic factorable? What does its graph look like? But I thought that you could not take the square root of a negative number??? i is called an imaginary number because many thought that the square root of an imaginary number was impossible.

3. Complex Numbers Complex numbers are the combination of real numbers and imaginary numbers. Complex numbers are written in the form: Real Part Imaginary Part

4. Simplifying Complex Numbers

6. Solve the quadratic equation

7. Adding and Subtracting (add or subtract the real parts, then add or subtract the imaginary parts) Ex: Ex:

8. Multiplying complex numbers Simplify the following:

9. Multiplying complex numbers Simplify the following: