已知A=
(311
212
123)
，B=
(11-1
2-10
101)
求，BA，AB-BA．
AB= (6 2 -2 6 1 0 8 -1 2) BA= (4 0 0 4 1 0 4 3 4) AB-BA= (2 2 -2 2 0 0 4 -4 -2)
已知A=
(311
212
123)
，B=
(11-1
2-10
101)
求，BA，AB-BA．
AB= (6 2 -2 6 1 0 8 -1 2) BA= (4 0 0 4 1 0 4 3 4) AB-BA= (2 2 -2 2 0 0 4 -4 -2)
