प्रत्येक आव्यूह का सहखण्डज ज्ञात कीजिए-
`[(1,-1,2),(2,3,5),(-2,0,1)]`

Explanation

माना `A=[(1,-1,2),(2,3,5),(-2,0,1)]`
`A_(11)=(-1)^(1+1)|(3,5),(0,1)|=3,A_(12)=(-1)^(1+2)|(2,5),(-2,1)=-12`
`A_(13)=(-1)^(1+3)|(2,3),(-2,0)|=6`
`A_(21)=(-1)^(2+1)|(1,2),(0,1)|=1,A_(22)=(-1)^(2+2)|(1,2),(-2,1)|=5`
`A_(23)=(-1)^(2+3)|(1,-1),(-2,0)|=2`
`A_(31)=(-1)^(3+1)|(-1,2),(3,5)|=-11`
`A_(32)=(-1)^(3+2)|(1,2),(2,5)|=-1,A_(33)=(-1)^(3+3)|(1,-1),(2,3)|=5`
`:.adjA=[(A_(11),A_(12),A_(13)),(A_(21),A_(22),A_(23)),(A_(31),A_(32),A_(33))]`
`=[(3,-12,6),(1,5,2),(-11,-1,5)]'=[(3,1,-11),(-12,5,-1),(6,2,5)]`