Given ,`A=[[1,-3],[ 2, 0]]`
`|A|=6!=0`
A is non singular thus invertible matrix
Let `C_(ij)` be the cofactors of A then
C=`[[0,-2],[3,1]]`
=adj(A)=`[[0,-2],[3,1]]^T`
=`[[0,3],[-2,1]]`
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