It is 21
Yes because 21 is a rational number
21
Yes, they are.
The square root and square functions are inverse of one another EXCEPT that square root is not really a function: it is a 1-to-many mapping. So sqrt(square(21)) = sqrt(441) = ±21
21The square root of 441 is 21
441 square root
441 has two square roots; 21 or -21.
21
It is 21
Yes because 21 is a rational number
21
Yes, they are.
The square root and square functions are inverse of one another EXCEPT that square root is not really a function: it is a 1-to-many mapping. So sqrt(square(21)) = sqrt(441) = ±21
i21 = square root of (-441)
length x length = area length = square root of 441= 21 inches
You just have to divide 441 by a few numbers until you get the same number you divided by. 441 divided by 10 is 44.1 so try 12. 441 divided by 12 is 36.75. Continuing this trial and error, you eventually find that 441/21 is equal to 21. Therefore 21 squared is 441; and the square root of 441 is 21. Or you just put in a calculator 441 and hit the squared button that looks like this: √