Problem:
Compute the nullity of
$\left(
\begin{array}{ccc}
 5 & -5 & -5 \\
 -10 & -8 & -8 \\
 1 & 5 & 9 \\
 0 & 0 & 9 \\
\end{array}
\right)$.
Answer:
$0$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/rank_and_nullity/43776.txt'}