If A = 
, show that adj A = A.
Here, 
Now, we have to find adj A, and for that, we have to find co-factors:
Thus, adj A = A
Hence Proved
1
If A = , show that adj A = A.
Here,
Now, we have to find adj A, and for that, we have to find co-factors:
Thus, adj A = A
Hence Proved