That would be its square root, or 11.286..; it could be positive or negative
9 x 9
No, two is a prime number. No number can be multiplied by itself to equal 2.
19.59592 does. (rounded)
The only number that, when multiplied by itself is 0, is 0
the square root of the given number
Taking the square root means to find a number that, when squared (when multiplied by itself) is equal to the given number. If I ask for the square root of 9, I want a number that, when multiplied by itself, is equal to 9 - in this case, the answer is 3.
When a number is squared, it means that it is that number is multiplied by itself. So in this case it would be 9x9 which is equal to 81.
The number is called a 'square root'.
7.74596669241483 (There is no whole number that if multiplied by itself will equal sixty)