(A,B^T) =1 1 2 1 2 -12 2 3 0 1 24 3 3 0 1 2经初等行变换化为1 0 0 3 4 -7 0 1 0 -6 -8 14 0 0 1 2 3 -4 所以 X = 3 4 -7 -6 -8 14 2 3 -4
