1. Ex: Solve x 2 + 6x +10 = 0 a = b = c = 1 st 2 nd

2. Solve x 2 + 7x +14 = 0 a = b = c = 1 st 2 nd

3. Questions on any previous hw?

4. Graphing in the Complex Plane

5. The Complex Plane

6. Graphing in the complex plane

7. Absolute Value of a Complex Number The distance the complex number is from the origin on the complex plane. If you have a complex number (a + bi) the absolute value can be found using:

8. Find the absolute value of the complex number. 1. 15 + 8i

9. Find the absolute value of the complex number. 2. -5 + 6i

10. Find the absolute value of the complex number. 3. -2 – 4i

11. Find the absolute value of the complex number. 3. 9i

12. Examples 1. 2. Which of these 2 complex numbers is closest to the origin (smallest distance)? -2+5i

13. Try These!!! 1. 2. Which of these 2 complex numbers is closest to the origin? 3i3i

14. Assignment p.19 #1 – 17 p. 20 #1 – 8 p.94 #8, 10