## Complex numbers Review

### What are complex numbers?

A complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i has a value of √-1. Because no real number satisfies √-1, i is called an imaginary number. For the complex number a + bi, a is called the real part, and b is called the imaginary part.

### what are the values of i and i²?

### How to add or subtract complex numbers?

Add like terms

### How to multiply complex numbers.

To multiple complex numbers, multiply like you normally would, but substitute -1 for i²

### How to divide complex numbers.

multiply the the denominator and numerator of the quotient by the conjugate of the denominator, then simplify.