<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
<script id="MathJax-script" async src="https://unpkg.com/mathjax@3/es5/tex-mml-chtml.js"></script>
\{\% include math.html \%\}
remove 4 \
When \(a \ne 0\), there are two solutions to \(ax^2 + bx + c = 0\) and they are \[x = {-b \pm \sqrt{b^2-4ac} \over 2a}.\]
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Block Mathjax
\[f(x) = ax + b\]Inline Mathjax $a \neq b$