solve the linear system by gauss-jordan elimination
− 2b + 3c = 1 ,
3a + 6b − 3c = −2,
6a + 6b + 3c = 5
The linear system can be written in matrix form as below
0 -2 3 a 1
3 6 -3 b = -2
6 6 3 c 5
we further reduce the above matrix as follows
The augmented matrix is
0 -2 31
3 6 -3 -2
6 6 3 5
applying R1 R3 we obtain
3 6 -3 -2
0 -2 3 1
6 6 3 5
applying R3 R3-2R1 WE OBTAIN
3 6 -3 -2
0 -2 3 1
0 -6 9 15
Applying R3 R3-3R2 we obtain
3 6 -3 -2
0 -2 3 1
0 0 0 12
applying R1 R1/3, R3 R3/12, R2 R2/-2, We obtain the below
1 2 -1 -2/3
0 1 -3/2 -1/2
0 0 0 1
applying R1 R1-2R2 we obtain
1 0 2 1/3
0 1 -3/2 -1/2
0 0 0 1
using the above, we obtain the corresponding matrix as
a + 2c = 1/3
b - (3/2)c =-1/2
0a + 0b + 0c =1
The last equation gives 0=1 which is not possible.
Hence there is no solution.
Comments