[−22−22]\left[\begin{array}{ll}-2 & 2 \\-2 & 2\end{array}\right][−2−222]
B=[2233]B=\left[\begin{array}{ll}2 & 2 \\3 & 3\end{array}\right]B=[2323]
[0030]\left[\begin{array}{ll}0 & 0 \\3 & 0\end{array}\right][0300]
[−2−222]\left[\begin{array}{cc}-2 & -2 \\2 & 2\end{array}\right][−22−22]