The root symbol (√ ) is used to represent the square root of any number. For example, the square root of 2 is represented by √2. ... we can denote the square roots for them as √5, √6, √7, √8, and √10, respectively. This symbol always denotes the positive square root.

Where did the square root symbol come from?

Chinese mathematical writings from around 200BC show that square roots were being approximated using an excess and deficiency method. In 1450AD Regiomontanus invented a symbol for a square root, written as an elaborate R. The square root symbol √ was first used in print in 1525.

What does this symbol mean √?

√ is the symbol for square root. A square root is the number that, when multiplied by itself, gives the original number. For example, the square root of 4 is 2, because 2 x 2 = 4. The square root of 9 is 3, because 3 x 3 = 9.