# Complex numbers

## The imaginary unit i

Learn
Intro to the imaginary numbersIntro to the imaginary numbersSimplifying roots of negative numbersPowers of the imaginary unitPowers of the imaginary uniti as the principal root of -1
Practice
Simplify roots of negative numbersGet 3 of 4 questions to level up!
Powers of the imaginary unitGet 3 of 4 questions to level up!

## Complex numbers introduction

Learn
Intro to complex numbersIntro to complex numbersClassifying complex numbers
Practice
Parts of complex numbersGet 3 of 4 questions to level up!
Classify complex numbersGet 3 of 4 questions to level up!

## The complex plane

Learn
Plotting numbers on the complex planeThe complex plane
Practice
Plot numbers on the complex planeGet 3 of 4 questions to level up!

## Adding and subtracting complex numbers

Learn
Practice
Add & subtract complex numbersGet 3 of 4 questions to level up!

## Multiplying complex numbers

Learn
Multiplying complex numbersMultiplying complex numbersComplex number operations review
Practice
Multiply complex numbers (basic)Get 3 of 4 questions to level up!
Multiply complex numbersGet 3 of 4 questions to level up!

Learn