Determinant of a 2 x 2 Matrix
Determinants of a 2 x 2 Matrix
To take the determinant of a matrix, you multiply the top-left-to-bottom-right diagonal, and from this you subtract the product of bottom-left-to-top-right diagonal.
Remark
Determinants can be expanded using any one of the rows and columns.
Note:
Expansion of Determinant using first row only