Question

evaluate each of the determinants using cofactors
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Answer 1

a11 = 3(0)+4(3)

=12

a12 = -(3-6)=3

a12= -4-0=-4

a21= -(3-0)= -3

a22 = 6-0=6

a23 = -(-8-3)=11

a31 = 2-0= 2

a32= -(4-0)=-4

a33 = 0-1= -1