1. By: Jeffrey Bivin Lake Zurich High School jeff.bivin@lz95.org Last Updated: October 30, 2006

2. The Imaginary Unit Jeff Bivin -- LZHS

3. More about Imaginary Numbers Jeff Bivin -- LZHS

4. This is fun! Jeff Bivin -- LZHS

5. Complex Numbers For any real numbers a and b, the number a + bi is a complex number. Examples: Jeff Bivin -- LZHS

7. Addition & Subtraction Example 1 Example 2 Example 3 Jeff Bivin -- LZHS

8. Multiplication Example 1 Example 2 Jeff Bivin -- LZHS

9. Graphing Complex Numbers Jeff Bivin -- LZHS

10. Solve using the Quadratic Formula x 2 + 6x + 13 = 0 a = 1 b = 6 c = 13 Jeff Bivin -- LZHS

11. Solve using the Quadratic Formula 3x 2 + 7x + 5 = 0 a = 3 b = 7 c = 5 Jeff Bivin -- LZHS

12. Solve using the Quadratic Formula 3x 2 - 2x + 5 = 0 a = 3 b = -2 c = 5 Jeff Bivin -- LZHS