\documentclass[12pt]{article}
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\begin{document}
\begin{equation*}
b_\text{ee} = \left(\frac{a_\text{ee}}{\beta}\right)^\frac{1}{2}, \ \ \ \ \ \ \ \ 
b_\text{ep} = \left(\frac{a_\text{ep}}{\beta}\right)^\frac{1}{2}
\end{equation*}
\end{document}