Skip to main content
Master

Complex Numbers

Master complex numbers with interactive lessons and practice problems! Designed for students like you!

Understanding Complex Numbers

Choose your learning level

Watch & Learn

Video explanation of this concept

concept. Use space or enter to play video.
Beginner

Start here! Easy to understand

Now showing Beginner level explanation.

Beginner Explanation

A complex number is a number that can be expressed in the form $a + bi$, where $a$ and $b$ are real numbers.

Practice Problems

Test your understanding with practice problems

1

Quick Quiz

Single Choice Quiz
Beginner

Which of the following is a purely imaginary number?

Please select an answer for all 1 questions before checking your answers. 1 question remaining.
2

Real-World Problem

Question Exercise
Intermediate

Teenager Scenario

You are playing a video game where you have to navigate using complex numbers. You start at the origin. Where will you end up if you move according to the complex number $-5 + 6i$?
Click to reveal the detailed solution for this question exercise.
3

Thinking Challenge

Thinking Exercise
Intermediate

Think About This

Calculate the absolute value or modulus of the complex number $3 + 4i$.

Click to reveal the detailed explanation for this thinking exercise.
4

Challenge Quiz

Single Choice Quiz
Advanced

What are the real and imaginary parts of the complex number $-3 + 7i$?

Please select an answer for all 1 questions before checking your answers. 1 question remaining.

Recap

Watch & Learn

Review key concepts and takeaways