How to use plus minus(±) symbol in LaTeX?

Type of symbolMathematics
Package (requirement)No
Latex command\pm
Examplea \pm b → a ± b

Mathematically, use of plus-minus symbols is much higher. And \pm command is present to denote the plus-minus symbol in latex. You don’t have to take any external package for this.

   \[ a \pm b \]
   \[ x=\frac{-b\pm\sqrt{b^2-4ac}}{2a} \]
   \[ 2ax_1=-b\pm\sqrt{b^2-4ac} \]

Output :

Plus minus symbol.

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