What is cofactor expansion? Cofactor expansion is a way of computing the determinant of a matrix. Recall that a determinant is a number related to various important properties of a matrix. In particular, you can invert a matrix if, and only if, its determinant is not equal to zero. Inverti...
Find the determinant of the matrix A = \begin{bmatrix} 3 & 5 & -1\ 4 & 0 & 2\ -6 & -3 & 2 \end{bmatrix} by cofactor expansion about one of the row.Find the cofactors C_{ij} for the second column of the matrix A, and then find the determinant. A = ...