Square root of 391

Sqrt(391). Find the square root of 391 or any other real number, positive or negative. Here are the answers to questions like: Square root of 391 or what is the square root of 391?

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, 19 is the square root of 361 because 19² = 19•19 = 361, -19 is square root of 361 because (-19)² = (-19)•(-19) = 361. 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 391