how do you do the square root?

5 squared is 25         $$5^2=5\times 5 = 25$$

so

square root of 25 is 5        $$\sqrt{25}=5$$

Square and square root are opposites of each other.

If you type it into the calc it is sqrt(25)  You need the brackets

$${\sqrt{{\mathtt{25}}}} = {\mathtt{5}}$$

I'm sorry but this question does not make any sense! If you want to find the square root of a particular thing then u need to give us a proper question! 

You can type "sqrt" into the calculator on the homepage.