M3.xml

<?xml version='1.0' encoding='UTF-8'?>
<exercise xmlns="https://spatext.clontz.org" version="0.0">
  <statement>
      <p>Explain why the matrix <m>{{name}}={{matrix}}</m> is or is not invertible.</p>
  </statement>
  <answer>
      <p><me>\operatorname{RREF}{{matrix}}={{rref}}</me></p>
      <p><m>{{name}}</m> is {{^invertible}}not {{/invertible}} invertible.</p>
  </answer>
</exercise>