square root

Square Root

A nonnegative number that must be multiplied times itself to equal a given number. The square root of x is written or x½. For example, since 32 = 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

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