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If A=[{:(4,5),(8,9):}], then find adjA....

If `A=[{:(4,5),(8,9):}]`, then find adjA.

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`A=[{:(4,5),(8,9):}]`
`A_(11)=9,A_(12)=-8, A_(21)=-5, A_(22)=9`…..
adj `A=[{:(A_11,A_12),(A_21,A_22):}]^(T)=[{:(A_11,A_21),(A_12,A_22):}]=[{:(9,-5),(-8,4):}]`
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