0005.ptx

<exercise checkit-seed="0005" checkit-slug="G3" checkit-title="Eigenvalues">
  <statement>
    <p>Explain how to find the eigenvalues of the matrix <m> \left[\begin{array}{cc}
-4 &amp; 2 \\
8 &amp; 2
\end{array}\right] </m>.</p>
  </statement>
  <answer>
    <p>The characteristic polynomial of <m> \left[\begin{array}{cc}
-4 &amp; 2 \\
8 &amp; 2
\end{array}\right] </m> is <m> \lambda^{2} + 2 \lambda - 24 </m>.</p>
    <p>The eigenvalues of <m> \left[\begin{array}{cc}
-4 &amp; 2 \\
8 &amp; 2
\end{array}\right] </m> are <m> -6 </m> and <m> 4 </m>.</p>
  </answer>
</exercise>