Cube Roots

# Cube Roots

GCSE(F),

To find a cube root of a number, find a number which, when three versions of itself are multiplied together, gives you the original number. Finding a cube root is the inverse (opposite) operation to cubing a number.

The symbol used to show a cube root is root(3)  , which is a square root sign but with a small 3 preceding it.

root(3)27 = 3, as three multiplied by itself three times gives 27.

A cube root of a negative number gives a negative number: root(3)-8 = -2, as -2 x -2 x -2 = -8.

## Examples

1. root(3)1000

2. Calculate root(3)0.008