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...

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
https://answers.yahoo.com/question/index?qid=20100...

Put the Equation Into the Proper Form. In the equation x²  49 = 0, the second element on the left side (49) must be removed to isolate x². This is easily accomplished
http://www.ehow.com/info_8758337_squarerootmetho...
