Square root of 400

Sqrt(400). Find the square root of 400 or any other real number, positive or negative. Here are the answers to questions like: Square root of 400 or what is the square root of 400?

What is square root? Definition of square root

A square root of a number 'x' is a number y such that y² = x, in other words, a number y whose square is y. For example, 20 is the square root of 400 because 20² = 20•20 = 400, -20 is square root of 400 because (-20)² = (-20)•(-20) = 400. When writing math, people often use sqrt(x) to mean the square root of x. Read more about square root here: Square Root - Wikipedia and here: Square Root - Wolfram

Square Symbol?

Here is the square root symbol. It is is denoted by √, known as the radical sign or radix.

Square root of values around 400