A =
1 2 -5 -6 0 -5
0 1 -6 -3 0 2
0 0 0 0 1 0
化为行最简矩阵
=
1 0 7 0 0 -9
0 1 -6 -3 0 2
0 0 0 0 1 0
其通解为:
-7 0
6 3
1 0
0 1
0 0