If B = `[{:(3,2,0),(2,4,0),(1,1,0):}]`, then what is adjoint of B equal to ?

If B=[{:(3,2,0),(2,4,0),(1,1,0):}] than what is adjoint of B equal to ?

If A=[{:(1,0,0),(0,1,0),(a,b,-1):}] then A^(2) is equal to

If A=[{:(1,0,0),(0,1,0),(a,b,-1):}] then A^(2) is equal to

If P = [(d_(1),0,0),(0, d_(2),0),(0,0,d_(3))] then Adjoint (P) is equal to

If {:A=[(1,0,0),(0,1,0),(a,b,-1)]:} , then A^2 is equal to

adj- [{:( 1,0,2),(-1,1,-2),(0,2,1):}]=[{:(5,a,-2),(1,1,0),(-2,-2,b):}] , then [a, b] is equal to-

Suppose the vectors x_(1), x_(2) and x_(3) are the solutions of the system of linear equations, Ax=b when the vector b on the right side is equal to b_(1), b_(2) and b_(3) respectively. If x_(1)=[(1),(1),(1)], x_(2)=[(0),(2),(1)], x_(3)=[(0),(0),(1)], b_(1)=[(1),(0),(0)], b_(2)=[(0),(2),(0)] and b_(3)=[(0),(0),(2)] , then the determinant of A is equal to :