The symbol \sqrt5 represents the square root of the number 5. It is a mathematical expression that indicates a value which, when multiplied by itself, equals 5. The square root of 5 is an irrational number, meaning it cannot be expressed as a simple fraction. Its approximate decimal value is 2.236. In mathematics, square roots are often used in various calculations, including geometry and algebra. The concept of square roots is fundamental in understanding quadratic equations and is also related to the Pythagorean theorem, which involves the lengths of the sides of a right triangle.