# Square Root Symbols

Written by Jerry Ratzlaff on . Posted in Nomenclature & Symbols for Engineering, Mathematics, and Science

## Square Root Symbols

This is a list of most common square root symbols:

SymbolDefinitionExample
$$\sqrt a$$ Square root - $$\sqrt a \;\times\; \sqrt a = a$$ $$\sqrt 9= 3$$
$$^3\sqrt a$$ cube root - $$^3\sqrt a \;\times\; ^3\sqrt a \;\times\; ^3\sqrt a = a$$ $$^3\sqrt 9 = 2.08008382305$$
$$^4\sqrt a$$ 4th root - $$^4\sqrt a \;\times\; ^4\sqrt a \;\times\; ^4\sqrt a \;\times\; ^4\sqrt a = a$$ $$^4\sqrt 9 = 1.73205080757$$
$$^n\sqrt a$$ n-th root $$n=5\;$$, $$\;^n\sqrt 9 = 1.55184557391$$