Find the inverse of the matrix $\left(\begin{array}{l l }-3 & 2 \\ 5 & -3\end{array}\right)$ Hence, find the matrix P satisfying the matrix equation P$\left(\begin{array}{l l }-3 & 2 \\ 5 & -3\end{array}\right)$ = $\left(\begin{array}{l l }1 & 2 \\ 2 & -1\end{array}\right)$ .

If A and B are square matrices of order 3 such that |A| = –1, |B| = 3, then find the value of |2AB|.