1. Warm-up 7-8

2. Lesson 7-8 Complex Numbers & Graphing
Objectives
Students will:
Graph complex numbers in a plane
Find absolute values of complex numbers

3. Graphing Complex Numbers Graph on a coordinate plane
x-axis → real axis
y-axis → imaginary axis
Example 1 Graph
2 + 0i
2 + 5i 3i
-4 – 2i

4. Absolute Value
Abs. value of real #’s is the distance from zero
Absolute value of complex #’s is distance to coordinates on graph
Use pythagorean theorem:

5. Example 2
Example 3
HW 86
Quiz tomorrow:
Lessons 7-5 through 7-8
HW’s 80, 81, 84, 86