Obtain the unit-impulse response of the following system using MATLAB

\[\begin{aligned}& \begin{array}{l}\dot{x}_{1} \\\dot{x}_{2}\end{array}=\begin{array}{rrr}0 & 1 \\-1 & -2 & x_{1} \\x_{2}\end{array}+\begin{array}{l}0 \\1\end{array} u \\& y=\left[\begin{array}{ll}1 & 1\end{array}\right] \begin{array}{l}x_{1} \\x_{2}\end{array}+[0] u\end{aligned}\]