can you guys explain the question to me
Put the following matrices into reduced row echelon form, indicating the row operations you use. Give the corresponding elementary matrix decomposition of A
$$ \left[ \begin{array}{ccc} 2&1&1\\ 1&2&1\\ 1&1&2 \end{array} \right] $$
i put the matrix in RREF form, but i dont know how to get the elementary matrix.