Square (algebra)

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 Exponentiation