Instructional Video
Khan Academy

Khan Academy: Finding Inverses of Matrices: Nxn Determinant

9th - 10th Standards
Defining the determinant for nxn matrices. An exampled of a 4x4 determinant.
Instructional Video
Khan Academy

Khan Academy: Finding Inverses of Matrices: Determinants Along Other Rows/cols

9th - 10th Standards
Finding the determinant by going along other rows or columns
Instructional Video
Khan Academy

Khan Academy: Finding Inverses of Matrices: Example of Finding Matrix Inverse

9th - 10th Standards
Example of calculating the inverse of a matrix
Instructional Video
Khan Academy

Khan Academy: Finding Inverses of Matrices: Formula for 2 X2 Inverse

9th - 10th Standards
Figuring out the formula for a 2x2 matrix. Defining the determinant.
Instructional Video
Khan Academy

Khan Academy: Finding Inverses of Matrices: Rule of Sarrus of Determinants

9th - 10th Standards
A alternative "short cut" for calculating 3x3 determinants (Rule of Sarrus)