We know that cofactor of aij = Aij = (-1)i+j Mij
Where Mij = Minor = Determinant of order n – 1
⇒ Cofactor of a32 = A32 = (-1)3+2 M32
= (-1)5 (-11)
= (-1) (-11)
∴ Cofactor of the element a32 = 11
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