Ononot — If A = \begin{pmatrix} 1 & 2 \\ 3 & 4 \end{pmatrix}, find \d

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Determinantshard

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If $A = \begin{pmatrix} 1 & 2 \\ 3 & 4 \end{pmatrix}$ , find $\det(A^3 - 2A)$ .