Symbols and notation
Square-root symbol
The radical sign requests a root; without a written index it means the principal square root, and with an index it specifies another root degree.
In one sentence
What does Square-root symbol mean?
The radical sign requests a root; without a written index it means the principal square root, and with an index it specifies another root degree.
How it is written
√x; ⁿ√x
A compact example
√49=7 and ³√27=3.
Other names and search terms
√, radical sign, root symbol, square root sign.
Where this fits
When should you learn Square-root symbol?
The first encounter is not the final level. Many ideas begin visually, become computational in high school and become formal in college.
- 1Pre-high schoolPrepare foundations
- 2High schoolUsually introduced
- 3CollegeGreater depth
- 4AdvancedGreater depth
- Mathematical notation
- Algebra
- Reading equations
- Fluent formula reading
- Advanced mathematics
Recognising notation reduces friction when formulas become denser.
Open the Zero-to-QM pathClear answers
Questions about Square-root symbol
What does Square-root symbol mean in mathematics?
The radical sign requests a root; without a written index it means the principal square root, and with an index it specifies another root degree.
How is Square-root symbol written?
A common notation is √x; ⁿ√x.
What is an example of Square-root symbol?
√49=7 and ³√27=3.