Verify `A (a d j A) = (a d j A) A = |A|I`
`[(1,-1,2),(3,0,-2),(1,0,3)]`

Explanation

To verify the equation \( A \cdot \text{adj}(A) = \text{adj}(A) \cdot A = |A|I \) for the matrix

\[
A = \begin{pmatrix}
1 & -1 & 2 \\
3 & 0 & -2 \\
1 & 0 & 3
\end{pmatrix}
...