Question

Describe a row operation or sequence of row operations that can be used to transform the
first augmented matrix, A, to the second augmented matrix, B.
a. A =
1 2 1 1
2 −1 2 2
3 1 3 3
⎡
⎣
⎤
⎦
to B =
1 2 1 1
0 1 0 0
3 1 3 3
⎡
⎣
⎤
⎦