# Powers and roots

## Indices – (or index) says how many times to use the number in a multiplication, called a POWER.

**In the seas**, (indices) remember who has the **POWER**.

**Example 1**

`5^4 = 5` to the power of `4`

`= 5\times5\times5\times 5 = 625`

**Example 2**

This is said to be `5` to the power of `2`. When a number is to the power of `2` it is said to be squared.

**Example 3**

This is said to be `4` to the power of `3` which is `4\times4\times4 = 64`.

**Example 4**

`9^(1/2)=sqrt9=3`

Here `9` is to the power of a half, which is the same as the square root, which in this case is `3`.

**Example 5**

`x^2`

This is `x` to the power of `2`. Which is `x` squared, which is `x\ times\ x`