## Complex Numbers: An Introduction

A complex number can be expressed in the form:

**a + b**

*i*where **a** and **b** are real numbers.

The number * i* is defined as the square root of -1. It is an

**imaginary number**, since the square root of any negative number is not a real number.

Complex numbers are not algebraic expressions. They are numbers, containing a real part (**a**) and an imaginary part (**b i**).

## Bottomless Worksheet of Multiplying Complex Numbers

This Bottomless Worksheet is a great way to practice multiplying complex numbers by real numbers and each other. At the click of a button, it creates ten more problems for you to solve. A printed copy and answer sheet is also available.