Question

线性代数，矩阵化成行阶梯形矩阵

线性代数，矩阵化成行阶梯形矩阵麻烦写下步骤，谢谢

Answer 1

Answer 2

A =
2 -1 -1 1 2
1 1 -2 1 4
4 -6 2 -2 4
3 6 -9 7 9
=

1 1 -2 1 4
2 -1 -1 1 2
4 -6 2 -2 4
3 6 -9 7 9
=

1 1 -2 1 4
0 -3 3 -1 -6
0 -10 10 -6 -12
0 3 -3 4 -3
=

1 1 -2 1 4
0 -3 3 -1 -6
0 -1 1 -3 6
0 0 0 3 -9
=

1 1 -2 1 4
0 -1 1 -3 6
0 -3 3 -1 -6
0 0 0 3 -9
=

1 1 -2 1 4
0 -1 1 -3 6
0 0 0 8 -24
0 0 0 3 -9
=

1 1 -2 1 4
0 -1 1 -3 6
0 0 0 -1 3
0 0 0 3 -9
=

1 1 -2 1 4
0 -1 1 -3 6
0 0 0 -1 3
0 0 0 0 0
=

1 1 -2 1 4
0 1 -1 3 -6
0 0 0 1 -3
0 0 0 0 0