Книга: Square number: Mathematics, Square, Square Root, Exponentiation, Zeroth, Integer Square Root, Methods of Computing Square Roots, Quadratic Residue, Polygonal Number, Square Triangular Number

High Quality Content by WIKIPEDIA articles! In mathematics, a square number, sometimes also called a perfect square, is an integer that can be written as the square of some other integer in other words, it is the product of some integer with itself. So, for example, 9 is a square number, since it can be written as 3 ? 3. Square numbers are non-negative. Another way of saying that a (non-negative) number is a square number, is that its square root is again an integer. For example, ?9 = 3, so 9 is a square number.