## Definitions

### from Wiktionary, Creative Commons Attribution/Share-Alike License.

- noun
*mathematics*thesymbol ± , meaning "plus or minus", used to indicate the precision of anapproximation (as in "The result is 10 ± 0.3", meaning the result is somewhere between 10 - 0.3, that is, 9.7, and 10 + 0.3, that is, 10.3), or as a convenient shorthand for a quantity with two possible values of opposing sign and identicalmagnitude (as in "The roots of the equation x2 - 4 = 0 are ±2").

## Etymologies

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## Examples

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