[−10−12]\left[\begin{array}{cc}-1 & 0 \\-1 & 2\end{array}\right][−1−102]
[10−1−2]\left[\begin{array}{cc}1 & 0 \\-1 & -2\end{array}\right][1−10−2]
[10−12]\left[\begin{array}{cc}1 & 0 \\-1 & 2\end{array}\right][1−102]
[−10−1−2]\left[\begin{array}{cc}-1 & 0 \\-1 & -2\end{array}\right][−1−10−2]