Problem:
Convert the following matrix to reduced row echelon form:
$\left(
\begin{array}{ccccc}
 2 & 6 & 10 & 9 & -4 \\
 10 & 4 & 2 & -9 & 4 \\
 -9 & -3 & -3 & 5 & 1 \\
 -6 & 9 & -8 & 8 & -2 \\
 9 & -8 & 3 & 3 & 0 \\
\end{array}
\right)$.
Answer:
$\left(
\begin{array}{ccccc}
 1 & 0 & 0 & 0 & 0 \\
 0 & 1 & 0 & 0 & 0 \\
 0 & 0 & 1 & 0 & 0 \\
 0 & 0 & 0 & 1 & 0 \\
 0 & 0 & 0 & 0 & 1 \\
\end{array}
\right)$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/row_reduce/41172.txt'}