The ^ symbol indicates exponentiation. If you're raising to a fractional
power (or taking a root other than the square root, parentheses are
important; i.e., =A1^(1/3) etc.
Sorry, but I found it by clicking on the drop-down list of functions to the
left of the fx enter window and searching for "square a value", which
returned the 'POWER' function, which is =POWER(Number, Power)