As an example, the square root of 49 is 7. It's this because the square root of a number is another number multiplied by itself(7X7=49).
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It is a keyboard, not a keybored ! There is no square root button on a standard keyboard, but if you are bored, you can find out how to program a key and get one of the keys to be your square root key.
It would be the square root key. (√) `it is not on the keyboard
So I assume you mean the square root and square root of 27=square root of (9x3)=3(square root (3))
The square root can be indicated by a check mark. √49 = 7, -7
Nothing!