(ii)
Answer:
(i)
Minor
of element 2 = M11 = 3
Minor
of element ?4 = M12 = 0
Minor
of element 0 = M21 = ?4
Minor
of element 3 = M22 = 2
Cofactor
of element 2 = A11 = (?1)1+1
M11
= (?1)2 . 3 = 3
Cofactor
of element ? 4 = A12 = (?1)1+2
M12
= (?1)3.0 = 0
Cofactor
of element 0 = A21 = (?1)2 +1
M21
= (?1)3 (?4) = 0
Cofactor
of elements 3 = A22 = (?1)2+2
M22
= (?1)4 . 2 = 0
(ii) 
Minor
of element a = M11 = d
Minor
of element c = M12 = b
Minor
of element b = M21 = c
Minor
of element d = M22 = d
Cofactor
of element 
Cofactor
of element c = A12 = (?1)1+2
Cofactor
of element b = A21 = (?1)2+1
Cofactor
of element d = A22 = (?1)2 + 2
M22
= (?1)4 . a = a.
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