1. 5-6 Complex Numbers Part 1 Big Idea: Identify and graph complex numbers.

2. Imaginary Numbers Imaginary numbers are represented by. Imaginary numbers are defined as the number whose square is -1. So and Imaginary numbers are of the form of a + bi where a and b are real numbers and b 0.

3. Ex 1: Simplify each number by using imaginary number i. A ) B) C) D) -

4. E)F)

5. Complex Numbers

6. Ex 2: Write each number in the form of a + bi. A)B) C) D)

7. E)F)

8. Complex Plane

9. Absolute value of a complex number

10. Ex 3: Find the absolute value of each complex number. A)B) C) D)

11. Ex 4: Simplify each expression. A) (5 – 2i)+ (-3 +i) B) (-7 + 3i) +(-4 – 4i)

12. C) (6 + 10i) + (-6i) D) 7 - (9 - 4i)