LaTeX Square Root (√) - Complete Guide
The square root symbol (√) represents the square root function in mathematics.
Symbol Preview
Square Root
LaTeX Code
No package required
\sqrt{x}Square root of x
No package required
\sqrt[n]{x}nth root of x
What is the LaTeX Square Root?
The square root symbol (√) is used to denote the principal square root. The \sqrt command in LaTeX can also be used for nth roots using the optional parameter.
How to Use Square Root in LaTeX
Method 1: Using \sqrt{x}
✅No package required
Square root of x
Example: Using \sqrt{x}
\documentclass{article}
\begin{document}
% Using the Square Root
Text with \sqrt{x}
\end{document}Method 2: Using \sqrt[n]{x}
✅No package required
nth root of x
Example: Using \sqrt[n]{x}
\documentclass{article}
\begin{document}
% Using the Square Root
Text with \sqrt[n]{x}
\end{document}Common Use Cases
The Square Root symbol is commonly used in the following contexts:
Square Root
Basic square root.
Code
$\sqrt{9} = 3$Output
√9 = 3
Nth Root
Root of any degree.
Code
$\sqrt[3]{8} = 2$Output
∛8 = 2
Complete Examples
Quadratic Formula with Roots
Square root in formulas
\documentclass{article}
\begin{document}
The solutions are:
$$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$
The square root in the numerator:
$$\sqrt{b^2 - 4ac}$$
\end{document}Frequently Asked Questions
Which method should I use?
We recommend using the method marked as "Recommended" above. However, the best method depends on your specific needs:
- \sqrt{x}: Square root of x
- \sqrt[n]{x}: nth root of x
Where do I use this symbol?
This symbol can be used:
- In mathematical equations (math mode)
- In regular text (if using text mode)
- In various document environments
Can I use this in display mode?
Yes, symbols that work in math mode (between $ $) also work in display mode (between $$ $$). This allows you to display the symbol on its own line with larger formatting.
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