Symbols and notation
Plus-minus symbol
The plus-minus sign compactly represents two values or cases, one formed with addition and the other with subtraction.
Common notation a±b
In one sentence
What does Plus-minus symbol mean?
The plus-minus sign compactly represents two values or cases, one formed with addition and the other with subtraction.
How it is written
a±b
A compact example
The solutions x=(−b±√(b²−4ac))/(2a) use + for one quadratic root and − for the other.
Other names and search terms
±, plus or minus, plus-minus sign, positive or negative symbol.
Clear answers
Questions about Plus-minus symbol
What does Plus-minus symbol mean in mathematics?
The plus-minus sign compactly represents two values or cases, one formed with addition and the other with subtraction.
How is Plus-minus symbol written?
A common notation is a±b.
What is an example of Plus-minus symbol?
The solutions x=(−b±√(b²−4ac))/(2a) use + for one quadratic root and − for the other.