Square roots

What is a square root?


A square root of a number is simply the value, that when multiplied by itself gives the original number.

So, the square root of 4 is 2 - because 2 x 2 equals 4

... and the square root of 16 is 4 - because 4 x 4 equals 16!


Here's some common square roots:




We use a tick type symbol to represent a square root in math - so the square root of 16 is written as ...