If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains ***.kastatic.org** and ***.kasandbox.org** are unblocked.

Main content

Learn

Practice

Powers of the imaginary unitGet 3 of 4 questions to level up!

Simplify roots of negative numbersGet 3 of 4 questions to level up!

Learn

Practice

Parts of complex numbersGet 3 of 4 questions to level up!

Classify complex numbersGet 3 of 4 questions to level up!

Plot numbers on the complex planeGet 3 of 4 questions to level up!

Practice

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

Graphically add & subtract complex numbers Get 3 of 4 questions to level up!

Learn

Practice

Multiply complex numbers (basic)Get 3 of 4 questions to level up!

Multiply complex numbersGet 3 of 4 questions to level up!

Learn

Practice

Complex number conjugatesGet 3 of 4 questions to level up!

Divide complex numbersGet 3 of 4 questions to level up!

Learn

Practice

Absolute value of complex numbersGet 3 of 4 questions to level up!

Angle of complex numbersGet 3 of 4 questions to level up!

Learn

Practice

Complex numbers from absolute value & angleGet 3 of 4 questions to level up!

Polar & rectangular forms of complex numbersGet 3 of 4 questions to level up!

Up next for you:#### Unit test

Level up on all the skills in this unit and collect up to 1500 Mastery points!