To unsquare a number, one must find its square root, which is a smaller number that will yield the original number that was squared. Squaring a number refers to multiplying a number by itself, or in other terms, putting a number to the exponent of two.
Squaring a number is a trivial operation: the number is simply multiplied by itself. Finding the square root is often difficult unless a calculator can be used. To find the square root of a number, guess a number and square it, and then keep repeating the process until a solution is found. The more common square roots may be identifiable by observation.