Khan Academy
Khan Academy: Algebra: Complex Numbers: Introduction to I and Imaginary Numbers
Video introduces i as the imaginary unit, gives two versions of the definition for i, and then shows what various powers of i equal. [5:20]
Study Pug
Study Pug: Introduction to Imaginary Numbers
Video tutorial introduces the notion of imaginary numbers, and how to simplify them. [10:19]
Study Pug
Study Pug: Complex Numbers and Complex Planes
Watch this video to learn what makes up a complex number, as well as how to plot on a complex plane. [5:45]
Khan Academy
Khan Academy: Precalculus: Imaginary and Complex Numbers: Basic Complex Analysis
This Khan Academy video lesson provides a concrete way to help students represent and visualize complex numbers. An Argand Diagram, magnitude, modulus, argument, and exponential forms are utilized in the lesson.
Sophia Learning
Sophia: Dividing Complex Numbers
This video lesson demonstrates how to divide with complex numbers, including the imaginary number i. The tutorial includes detailed examples. [3:26]