 #jsDisabledContent { display:none; } My Account | Register | Help • ### Complex numbers : Complex Numbers (part 2)

##### By: Sal Khan

Dividing complex numbers. Complex conjugates.

Understanding i and the complex plane

• ### Complex numbers : Dividing Complex Numbers

##### By: Sal Khan, Monterey Institute for Technology and Education

Dividing Complex Numbers

Understanding i and the complex plane

• ### Complex numbers : Complex Numbers (part 1)

##### By: Sal Khan

Introduction to complex numbers. Adding, subtracting and multiplying complex numbers.

Understanding i and the complex plane

• ### Complex numbers : Complex Numbers

##### By: Sal Khan, Monterey Institute for Technology and Education

Complex Numbers

Understanding i and the complex plane

• ### Complex numbers : Multiplying Complex Numbers

##### By: Sal Khan, Monterey Institute for Technology and Education

Multiplying Complex Numbers

Understanding i and the complex plane

• ### Complex numbers : Subtracting Complex Numbers

##### By: Sal Khan, Monterey Institute for Technology and Education

Subtracting Complex Numbers

Understanding i and the complex plane

• ### Complex numbers : Complex Conjugates Example

##### By: Sal Khan, Monterey Institute for Technology and Education

Complex Conjugates

Understanding i and the complex plane

• ### Intro to complex analysis : Exponential form to find complex roots

##### By: Sal Khan

Using exponential form to find complex roots

Understanding i and the complex plane

• ### Brain Teasers : 3-D Path Counting Brain Teaser

##### By: Sal Khan

Extending the path counting to three dimensions

Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!

• ### Brain Teasers : Blue Forehead Room Solution

##### By: Sal Khan

Do not watch before Blue Forehead Room. THIS IS THE SOLUTION!

Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!

• ### The imaginary unit i : Introduction to i and Imaginary Numbers

##### By: Sal Khan

Introduction to i and imaginary numbers

Understanding i and the complex plane

• ### Challenging complex number problems : IIT JEE Complex Numbers (part 1)

##### By: Sal Khan

2010 IIT JEE Paper 1 Problem 39 Complex Numbers (part 1)

Understanding i and the complex plane

• ### The imaginary unit i : Calculating i Raised to Arbitrary Exponents

##### By: Sal Khan

Calculating i raised to arbitrarily high exponents

Understanding i and the complex plane

• ### Brain Teasers : Light Bulb Switching Brain Teaser

##### By: Sal Khan

Turning light bulbs on and off.

Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!

• ### Intro to complex analysis : Complex Conjugates

##### By: Sal Khan

Complex Conjugates

Understanding i and the complex plane

• ### The imaginary unit i : Imaginary Roots of Negative Numbers

##### By: Sal Khan, Monterey Institute for Technology and Education

Imaginary Roots of Negative Numbers

Understanding i and the complex plane

• ### Brain Teasers : Toggler Brain Teaser

##### By: Sal Khan

Separating the truthteller from the togglers!

Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!

• ### The imaginary unit i : i as the Principal Root of -1 (a little tec...

##### By: Sal Khan

i as the principal square root of -1

Understanding i and the complex plane

• ### Intro to complex analysis : Basic Complex Analysis

##### By: Sal Khan

Argand Diagram, magnitude, modulus, argument, exponential form

Understanding i and the complex plane

• ### Complex numbers : Example: Complex roots for a quadratic

##### By: Sal Khan, Monterey Institute for Technology and Education

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. 