1. 5.7 complex numbers.notebook November 29, 2012
Imaginary Number : i
i = and i2 = ­1
1

2. 5.7 complex numbers.notebook November 29, 2012
Solve each equation.
7x2 = ­49 3x2 ­ 5 = ­29
2

3. 5.7 complex numbers.notebook November 29, 2012
x2 = ­ 20 (x + 3)2 = ­ 2
3

4. 5.7 complex numbers.notebook November 29, 2012
Add complex numbers. Write it in standard form a + bi.
(3 + 2i) + (1 ­ i)
(6 ­ 2i) ­ (1 ­ 2i)
4

5. 5.7 complex numbers.notebook November 29, 2012
(4 ­ 2i) + ( 1 + 3i)
(4 + 6i) ­ (2 + 3i)
5