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Given the square matrix A, the adjugate matrix (sometimes called the classical adjoint matrix) of A can be computed. We denote this matrix as adj(A). The entries of the adjugate matrix consist of the cofactors of the original matrix.

Be careful with ordering the entries, the (i,j) entry of the adj(A) is actually the (j,i) cofactor.

In particular, this video example computes the adjugate matrix of a 3x3 matrix.

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