the square root of 9 would be 3. as 3 x 3 =9
the square root of any number is asking what number times itself will give you the given number you are trying to square root. for example, the square root of 36 would be 6, as 6 x 6 = 36. I hope this helped
Doing a square root of one digit numbers is just multiplying by 2 so 18 is your answer.
