All Cofactor Expansions of a 2x2 Matrix | Linear Algebra Exercises

We do two examples of finding all cofactor expansions of a 2x2 matrix. That is, we find the cofactor expansions along each row, and the cofactor expansions along each column. As we'll see, the cofactor expansions is the same no matter which row or column we choose, and this is the determinant of the matrix. #linearalgebra

Cofactor Definition of Determinant:    • The Cofactor Definition of Determinants (L...  

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0:00 Intro
0:45 All Cofactors Example 1
2:37 Cofactor Expansions Example 1
4:26 All Cofactors Example 2
5:30 Cofactor Expansions Example 2
6:48 Conclusion

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