Square
Root
A nonnegative number that must be multiplied times
itself to equal a given number. The square root of x is
written or x^{½}.
For example, since
3^{2} = 9.
Note: never
refers to a negative number. Even though (–3)(–3)
= 9, we do not say that –3 is
a value of .
Also, if x itself is negative then is
imaginary.
See
also
nth root, cube
root, square root rules, radical
rules, rational exponents
