A =
1 -5 2 -3 11
5 3 6 -1 -1
2 4 2 1 -6
化为行最简矩阵:
=
1 0 9/7 -1/2 1
0 1 -1/7 1/2 -2
0 0 0 0 0
其全部解为:
k1(-9/7 1/7 1 0)^T +k2(1/2 -1/2 0 1)^T +(1 -2 0 0)