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Khan Academy
Khan Academy: Linear Algebra: 3 X 3 Determinant
A video lesson that shows how to find the determinant of a 3 x 3 matrix using cofactor expansion. Defines the formula in general terms then shows a concrete example. [10:01]
Khan Academy
Khan Academy: Linear Algebra: N X N Determinant
An instructional video that gives a recursive definition for the determinant of an N x N matrix based on cofactor expansion. Uses the definition to find the determinant of a concrete 4 x 4 matrix. [18:40]
Khan Academy
Khan Academy: Linear Algebra: Determinants Along Other Rows/cols
A video lesson describing how the determinants for larger matrices can be found using cofactor expansion on any row or column. Illustrates that it is helpful to choose rows or columns with zeros in order to simplify the computations....
Sophia Learning
Sophia: Finding the Determinant of a 3 X 3 Matrix, Laplace Expansion: Lesson 3
In this lesson students will learn how to find the determinant of a 3x3 matrix using Laplace Expansion. It is 3 of 7 in the series titled "Finding the Determinant of a 3 x 3 Matrix using Laplace Expansion."
Sophia Learning
Sophia: Finding the Determinant of a 3 X 3 Matrix, Laplace Expansion: Lesson 5
In this lesson students will learn how to find the determinant of a 3x3 matrix using Laplace Expansion. It is 5 of 7 in the series titled "Finding the Determinant of a 3 x 3 Matrix using Laplace Expansion."
Sophia Learning
Sophia: Finding the Determinant of a 3 X 3 Matrix, Laplace Expansion: Lesson 7
In this lesson students will learn how to find the determinant of a 3x3 matrix using Laplace Expansion. It is 7 of 7 in the series titled "Finding the Determinant of a 3 x 3 Matrix using Laplace Expansion."
Sophia Learning
Sophia: Finding the Determinant of a 3 X 3 Matrix, Laplace Expansion: Lesson 1
In this lesson students will learn how to find the determinant of a 3x3 matrix using Laplace Expansion. It is 1 of 7 in the series titled "Finding the Determinant of a 3 x 3 Matrix using Laplace Expansion."