Introduction to complex numbers. Adding, subtracting and multiplying complex numbers.
Understanding i and the complex plane
Complex Numbers
Dividing Complex Numbers
Dividing complex numbers. Complex conjugates.
Adding Complex Numbers
Subtracting Complex Numbers
Complex Conjugates
Counting paths in a square
Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!
Turning light bulbs on and off.
2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 1)
2010 IIT JEE Paper 1 Problem 53 Complex Determinant
Imaginary Roots of Negative Numbers
Argand Diagram, magnitude, modulus, argument, exponential form
Separating the truthteller from the togglers!
Saving Earth from becoming a mushroom farm.
2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 3)
How to get correct advice when you can only ask one question from either a liar or a truth-teller (when you don't know who is what)
Complex Roots from the Quadratic Formula
Understanding and solving equations with imaginary numbers. . Conceptual videos and worked examples from basic algebra through algebra 2. Includes videos from the former algebra worked examples playlists.
i as the principal square root of -1