Problem:
Find the characteristic polynomial of the following matrix:
$\left(
\begin{array}{cc}
 -5 & 6 \\
 -4 & 7 \\
\end{array}
\right)$
Answer:
$x^2-2 x-11$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/characteristic_polynomial/5480.txt'}