21. Find the square root: + or -sqrof121
How do you do this?
Use a calculator or Google's caluclator.
http://www.google.com/search?source=ig&hl=en&rlz=1G1GGLQ_ENUS374&q=square+root+121
I know square root of 121 is 11. But what does it mean when there's a plus or minus outside the square root?
it means the sqrt of 121 is either +11 or -11
check: (-11)(-11)=121
(+11)(+11)=121
so the answer would be + or - 11?,
or just 11?
To find the square root of a number, you can follow these steps:
Step 1: Determine the number for which you want to find the square root. In this case, the number is 121.
Step 2: Take the positive and negative square roots of the number. The positive square root is denoted by the symbol "√" and the negative square root is denoted by "-√".
So, to find the square root of 121, you can represent it as:
√121 = +11
-√121 = -11
Hence, the positive square root of 121 is 11 and the negative square root of 121 is -11.