Inverting 3x3 part 1: Calculating matrix of minors and cofactor matrix : Khan Academy on a Stick

Khan Academy on a Stick

Inverting matrices

Finding the determinant of a 2x2 matrix
Inverse of a 2x2 matrix
Idea behind inverting a 2x2 matrix
Matrices to solve a system of equations
Matrices to solve a vector combination problem
Finding the determinant of a 3x3 matrix method 1
Finding the determinant of a 3x3 matrix method 2
Inverting 3x3 part 1: Calculating matrix of minors and cofactor matrix
Inverting 3x3 part 2: Determinant and adjugate of a matrix
Classic video on inverting a 3x3 matrix part 1
Classic video on inverting a 3x3 matrix part 2
Singular matrices

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