Show that $A=\left[\begin{array}{cc} -2 &2\cr -1 &2 \end{array}\right]$ and $B=\left[\begin{array}{cc} -2 &1\cr -2 &2 \end{array}\right]$ are similar matrices by finding an invertible matrix $P$ satisfying $A=P^{-1} B P$.
$P^{-1} =$ $\left[\Rule{0pt}{2.4em}{0pt}\right.$$\left]\Rule{0pt}{2.4em}{0pt}\right.$, $P =$ $\left[\Rule{0pt}{2.4em}{0pt}\right.$$\left]\Rule{0pt}{2.4em}{0pt}\right.$