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Let A=[{:(1,-2,-3),(0,1,0),(-4,1,0):}] F...

Let `A=[{:(1,-2,-3),(0,1,0),(-4,1,0):}]` Find adj A.

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`A=[{:(1,-2,-3),(0,1,0),(-4,1,0):}]`
`A_11=0,A_12=0,A_13=4`
`A_21=-3,A_22=-12,A23=7`
`A_31=3, A_32=0,A_33=1`
adj `A=[{:(A_11,A_21,A_31),(A_12,A_22,A_32),(A_13,A_23A_33):}]=[{:(0,-3,3),(0,-12,0),(4," "7,1):}]`
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