# Square root and cube root

## Square root

The opposite of squaring a number is called finding the square root.

The symbol for the square root is .

### Example

The square root of is (because ).

The square root of is (because ).

The square root of is (because ).

Question

What is the square root of ?

, so is the square root of .

The symbol means square root, so:

means 'the square root of '.

means 'the square root of '.

You will also find a square root key on your calculator.

## Cube root

The opposite of cubing a number is called finding the cube root.

The symbol for the cube root is .

### Example

The cube root of is (because ).

The cube root of is (because ).

Question

What is the cube root of ?

, so is the cube root of .

### Example

The symbol means cube root, so:

, means 'the cube root of .

means 'the cube root of .