If \(\mathrm{P}=\left[\begin{array}{rr}5 & 3 \\ -1 & -2\end{array}\right]\) satisfies the equation P2 - 3P - 7l = 0, where I is an identity matrix of order 2, then P-1 is:
1
\(\frac{1}{7}\left[\begin{array}{rr}2 & 3 \\ -1 & -5\end{array}\right]\)
2
\(\left[\begin{array}{rr}2 & 3 \\ -1 & -5\end{array}\right]\)
3
\(\frac{1}{7}\left[\begin{array}{rr}2 & 3 \\ -1 & -1\end{array}\right]\)
4
\(\frac{1}{7}\left[\begin{array}{rr}2 & 5 \\ -1 & -1\end{array}\right]\)