sqrt(x) * sqrt(x) = x
http://wiki.answers.com/Q/What_is_the_formula_for_...

The square root formula is sqrt(x+iy) unless x = ?r and y = 0. Anything else?
http://www.chacha.com/question/whatisthesquare...

A square root is a number that can be multiplied by itself to get a number, and that number is a square number. For example, 3 x 3 equals 9, so three is the square root of nine.
http://www.ask.com/webanswers/Science/Mathematics...

There is a method for finding square roots. Strictly speaking, it is called an algorithm, not a formula. to find square root of 30, take a guess, say 6. 30/6 = 5. now take the average
http://answers.yahoo.com/question/index?qid=201002...
