Big Idea: -Add, subtract, multiply, and divide complex numbers.

Exponents of i (and then it goes back to the beginning again)

Ex 2: Simplify each expression. A)B) C)D)

E)F)

Complex Conjugate You cannot have i in the denominator of any fraction. To get rid of i in the denominator, you’ll need to multiply by the complex conjugate of the denominator. To find complex conjugate: switch the sign in the middle of complex number.

Ex 3: Simplify each expression. A)B)

Ex 3: Simplify each expression. C) D)

Ex 4: Solve. A) B)

Ex 4: Solve. C) D)

Ex 5: Simplify each expression. A)B)