customized-load.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta http-equiv="x-ua-compatible" content="ie=edge">
  <meta name="viewport" content="width=device-width">
  <title>MathJax v3 with customized list of components</title>
  <script>
  MathJax = {
    loader: {
      load: [
        'input/tex-base', '[tex]/newcommand', '[tex]/action',
        'output/chtml'
      ]
    },
    tex: {
      inlineMath: [['$', '$'], ['\\(', '\\)']],
      packages: ['base', 'newcommand', 'action']
    }
  };
  </script>
  <script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/startup.js"></script>
</head>
<body>

    <p>
    When $a \ne 0$, there are two solutions to \(ax^2 + bx + c = 0\) and they are
    $$x = {-b \pm \sqrt{\texttip{b^2-4ac}{descriminant}} \over 2a}.$$
    </p>

</body>
</html>