The expression "2√2" represents a mathematical value that combines a whole number and a square root. Here, "√2" is the square root of 2, which is approximately 1.414. When you multiply this value by 2, you get about 2.828. This expression is often encountered in geometry and algebra. In practical terms, "2√2" can be useful in various fields, such as engineering and physics, where precise calculations are necessary. It can also appear in problems involving triangles or circles, particularly when dealing with Pythagorean theorem applications.