1
$A' = \left[ {\begin{array}{*{۲۰}{c}}{ ۱} \\-۲\end{array}} \right] $
✓
✗
2
$A' = \left[ {\begin{array}{*{۲۰}{c}}{ -۲} \\-۱\end{array}} \right] $
✓
✗
3
$A' = \left[ {\begin{array}{*{۲۰}{c}}{ ۲} \\۱\end{array}} \right] $
✓
✗
4
$A' = \left[ {\begin{array}{*{۲۰}{c}}{ -۱} \\۲\end{array}} \right] $
✓
✗