I am using the \hphantom
command to center the middle 0, but the middle 0 is still too far left.
Here is a picture of my problem:
Here is my MWE:
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\begin{document}
\begin{align}
\Delta G =
\begin{cases}
< 0 & \quad A\\
\hphantom{<} 0 & \quad B\\
> 0 & \quad C \\
\end{cases}
\end{align}
\end{document}