Khan Academy

Matrix multiplication dimensions (K-A)

Properties of matrix multiplication-link (K-A)

Using identity & zero matrices (K-A)

Solving linear systems with matrices (K-A)

Using properties of matrix operations (K-A)

Zero matrix & matrix multiplication (K-A)

Matrix word problem: vector combination (K-A)

Representing linear systems with matrix equations (K-A)

Solving linear systems with matrix equations (K-A)

Determinant of a 2×2 matrix (K-A)

Absolute value & angle of complex numbers (K-A)

Absolute value of complex numbers (K-A)

Complex number absolute value & angle review (K-A)

Adding complex numbers (K-A)

Subtracting complex numbers (K-A)

Challenging complex numbers problem (1 of 3) (K-A)

Challenging complex numbers problem (2 of 3) (K-A)

Challenging complex numbers problem (3 of 3) (K-A)

Challenging complex numbers problem: complex determinant (K-A)

Complex number conjugates (K-A)

Dividing complex numbers (K-A)

Dividing complex numbers review (K-A)

Intro to complex number conjugates (K-A)

Distance & midpoint of complex numbers (K-A)

Complex number equations: x³=1 (K-A)