Khan Academy

Complex number polar form review (K-A)

Dividing complex numbers: polar & exponential form (K-A)

Powers of complex numbers (K-A)

Visualizing complex number multiplication (K-A)

Visualizing complex number powers (K-A)

Complex number operations review (K-A)

Multiplying complex numbers-link (K-A)

Multiplying complex numbers-video (K-A)

Complex number forms review (K-A)

Polar & rectangular forms of complex numbers (K-A)

Plotting numbers on the complex plane (K-A)

The complex plane-link (K-A)

Classifying complex numbers (K-A)

Intro to complex numbers (K-A)

Intro to complex numbers-video (K-A)

i as the principal root of -1 (K-A)

Intro to the imaginary numbers (K-A)

Intro to the imaginary numbers-video (K-A)

Powers of the imaginary unit (K-A)

Powers of the imaginary unit-link (K-A)

Simplifying roots of negative numbers (K-A)

Explicit formulas for arithmetic sequences (K-A)

Explicit formulas for arithmetic sequences-link (K-A)

Intro to arithmetic sequence formulas (K-A)

Intro to arithmetic sequences-video (K-A)