Square root of 821

Sqrt(821). Find the square root of 821 or any other real number, positive or negative. Here are the answers to questions like: Square root of 821 or what is the square root of 821?

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, 28 is the square root of 784 because 28² = 28•28 = 784, -28 is square root of 784 because (-28)² = (-28)•(-28) = 784. 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 821