Symbol  Format  Data 

±  Code Point 
U+00B1 
TeX 
\pm 

SVG 
In math, the plusminus symbol (±) has several uses, depending on the context:

Indicating both positive and negative solutions: When the plusminus symbol is used in equations or expressions, it represents both the positive and negative solutions for a given value. For example:
In this case, the plusminus symbol indicates that there are two possible values for , one positive and one negative: or .

Representing the range of error or uncertainty: In measurements, scientific notation, or statistical data, the plusminus symbol is used to indicate the range of error or uncertainty associated with a value. This is often seen in the context of confidence intervals or error margins. For example:
This expression means that the true value of lies in the range from to .
The plus symbol is used in math to represent the addition of two expressions.
The minus symbol is an arithmetic operator used to represent subtraction.