How to use roots (√, ∛) in LaTeX?

In this tutorial, you will learn how to use square root, cube root, and nth root in LaTeX. Follow the given table to get all the required commands.

Name	Command	Output
Square root	\sqrt{x}
Cube root	\sqrt[3]{x}
Fourth root	\sqrt[4]{x}
nth root	\sqrt[n]{x}

\documentclass{article}
\begin{document}

  $$ \verb|\sqrt{x}| \rightarrow \sqrt{x}$$
  $$ \verb|\sqrt[3]{x}| \rightarrow \sqrt[3]{x}$$
  $$ \verb|\sqrt[4]{x}| \rightarrow \sqrt[4]{x}$$
  $$ \verb|\sqrt[n]{x}| \rightarrow \sqrt[n]{x}$$
  
  \centering Some examples:

  $$ \frac{-b \pm \sqrt{b^2-4ac}}{2a} $$
  $$ t^\prime=\frac{t}{\sqrt{1-\frac{v^2}{c^2}}} $$

\end{document}

Output:

Uncovered Roots (√) symbol

In order to get an uncovered Root symbol, you can use the * symbol with the \sqrt command. In this case, you have to load the mdwmath package in the preamble of your document.

\documentclass{article}
\usepackage{mdwmath}
\begin{document}

  $$ \verb|\sqrt*{x}| \rightarrow \sqrt*{x}$$
  $$ \verb|\sqrt*[3]{x}| \rightarrow \sqrt*[3]{x}$$
  $$ \verb|\sqrt*[4]{x}| \rightarrow \sqrt*[4]{x}$$
  $$ \verb|\sqrt*[n]{x}| \rightarrow \sqrt*[n]{x}$$

\end{document}

Output: