The table below shows examples of complex numbers, with the real and imaginary parts identified. Some people find it easier to identify the real and imaginary parts if the number is written in standard …

You may want to start go back earlier in the unit and work thru the lessons for addition & subtraction of complex numbers, and then multiplication of complex numbers.

This topic covers: - Adding, subtracting, multiplying, & dividing complex numbers - Complex plane - Absolute value & angle of complex numbers - Polar coordinates of complex numbers

Sal explains how we obtain complex numbers by adding real numbers and imaginary numbers. Created by Sal Khan.

For example, 3 i , i 5 , and 12 i are all examples of pure imaginary numbers, or numbers of the form b i , where b is a nonzero real number. Taking the squares of these numbers sheds some light on how …

We'll learn what imaginary and complex numbers are, how to perform arithmetic operations with them, represent them graphically on the complex plane, and apply these concepts to solve quadratic …

The table below shows examples of complex numbers, with the real and imaginary parts identified. Some people find it easier to identify the real and imaginary parts if the number is written in standard …

Sometimes, thinking of i as a variable, like x , is helpful. Then, with just a few adjustments at the end, we can multiply just as we'd expect. Let's take a closer look at this by walking through several examples.

Dive into expressions involving the imaginary unit 'i', simplifying them to reveal the real and imaginary components. Learn how real and imaginary numbers are subsets of complex numbers and study …

Let's build off of our previous work with complex numbers and perform more sophisticated operations, like division. We'll also learn about a different and more visual way to represent complex …