Problem:
Find the characteristic polynomial of the following matrix:
$\left(
\begin{array}{cc}
 6 & -5 \\
 8 & 7 \\
\end{array}
\right)$
Answer:
$x^2-13 x+82$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/characteristic_polynomial/1292.txt'}