## Elementary Linear Algebra 7th Edition

The matrix $$\left[\begin{array}{llll}{0} & {1} & {0} & {0} \\ {0} & {0} & {1} & {2} \\ {0} & {0} & {0} & {0}\end{array}\right]$$ is in the row echelon form and it is also in the reduced echelon form.