Adjoint of the matrix A = [a_ij]_n×n is defined as the transpose of the matrix [A_ij]_n×n where A_ij is the co-factor of the element a_ij.

Let’s find the cofactors for all the positions first-

Here, A₁₁ = 4, A₁₂ = -3, A₂₁ = -2, A₂₂ = 1.

∴ Adj A =

=