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Khan Academy
Khan Academy: Linear Algebra: Determinant After Row Operations
A video lesson proving that the determinant of a matrix does not change even after performing row operations on the matrix. [10:25]
Khan Academy
Khan Academy: Linear Algebra: Simpler 4x4 Determinant
Video demonstrating how to find the determinant of a 4x4 matrix by using row operations and row replacements to get the matrix into upper triangular form. [9:13]
Khan Academy
Khan Academy: More Determinant Depth: Determinant After Row Operations
A video showing what happens to the determinant when we perform a row operation.
Khan Academy
Khan Academy: Finding Inverses of Matrices: Determinants Along Other Rows/cols
Finding the determinant by going along other rows or columns
Khan Academy
Khan Academy: More Determinant Depth: Simpler 4 X4 Determinant
This video, shows how to calculate a 4x4 determinant by putting in in upper triangular form first.