The inverse of the matrix $\begin{bmatrix}5 & 11\\1 & 2\end{bmatrix}$ is :

$\begin{bmatrix}-2 & 11\\1 & -5\end{bmatrix}$ $\begin{bmatrix}2 & -11\\-1 & 5\end{bmatrix}$ $\begin{bmatrix}5 & 1\\11 & 2\end{bmatrix}$ $\begin{bmatrix}5 & -1\\-11 & 2\end{bmatrix}$

$\begin{bmatrix}-2 & 11\\1 & -5\end{bmatrix}$