Square (algebra)
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In algebra, the square of a number is that number multiplied by itself.
Its notation is a superscripted "2", thus a number x squared is written as x2. Thus: <math>x^2 = x\times x<math>
If x is a positive real number, the value of x2 is equal to the area of a square of edge length x.
A positive integer that is the square of some other integer, for example 25 which is 52, is known as a square number, or more simply a square.
See also
Square root Exponentiationes:Cuadrado et:Ruut (algebra) fr:Carré (algèbre) nl:Kwadraat pl:Kwadrat (algebra) sv:Kvadrat zh:平方