Ononot — For the matrix A = \begin{pmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \\

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For the matrix $A = \begin{pmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{pmatrix}$ , the minor $M_{23}$ (determinant of the submatrix from deleting row 2 and column 3) equals $6$ . What is the cofactor $C_{23}$ ?