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Determinantshard
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Let A=(abcd)A = \begin{pmatrix} a & b \\ c & d \end{pmatrix}A=(ac​bd​). If det⁡(A)=5\det(A) = 5det(A)=5, what is the determinant of A2−(a+d)A+(ad−bc)IA^2 - (a+d)A + (ad-bc)IA2−(a+d)A+(ad−bc)I?