The command is \pm, which is used in math mode. Example:
x = 5 \pm 2
Use \mp for the minus-plus symbol. Example:
y = 7 \mp 3
Inline Mode: $ x = 10 \pm 2 $
Display Mode:
\[
x = 10 \pm 2
\]
Use the bm package and \bm{}:
\usepackage{bm}
$\bm{\pm}$
Utilize the graphicx package’s scalebox command:
\usepackage{graphicx}
$\scalebox{1.5}{\pm}$
Use the xcolor package:
\usepackage{xcolor}
$\textcolor{red}{\pm}$
\raisebox{} takes text out of math mode. Use $…$ or \ensuremath{}:
\raisebox{1pt}{$\pm$}
For manual spacing modifications, use \,:
x = 5 \pm\, 2
Make sure you are in math mode ($…$ or \[…\]).
[ x = 5 \mp 2 ]
Simply use \pm inside tabular or array environments:
\begin{bmatrix}
1 & \pm 2 \\
3 & \mp 4
\end{bmatrix}
Example:
x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}
Use \ensuremath{}:
\ensuremath{\pm}
Use \mp.
Use \approx.
Use \propto.