Find Square Root Symbol (Sign, Name, in Word)

Find Square Root Symbol (Sign, Name, in Word)

The square root symbol or square root symbol sign is a mathematical symbol denoted by “√”. This symbol is known in words as radical.

In math, you may have already learned about different types of symbols used to perform arithmetic operations. The root symbol (√) is used to represent the square root of any number.

Find Square Root Symbol (Sign, Name, in Word)

Square Root Symbol
Square Root Symbol

For example, the square root of 2 is represented by √2. Similarly, for other natural numbers like 5, 6, 7, 8, 10, etc., we can denote the square roots for them as √5, √6, √7, √8, and √10, respectively. This symbol always denotes the positive square root.

Radicand: The symbol for the square root is called a radical, while the number under the root is called a radicand. Therefore, in the examples given above, 2, 5, 6, 7, 8, 10 are the radicals.

Basically, the square root symbol is used to find the number which when multiplied by itself gives the original number present under the root. Let’s understand it with an example. If we multiply 3 by 3, we get 9, e.g. E.g. 3 x 3 = 9. Now if we take the square root of 9, √9, it is equal to 3 again, i.e. H. √9 = 3.

Root symbol (in Word)

The square root symbol in words is called a “radical”. Or we can say that a radical symbol (√) is used to represent the square root of any natural number.

Square Root Formula: The formula for calculating the square root is:

y = √a


y2 = a

Basically, we use the prime factorization method to find the square root of any number.

Example: 100 = 2x2x5x5

We can see two pairs of 2 and 5 here.

√100 = √(2x2x5x5)

Taking out the numbers in pairs, we get:

√100 = 2 x 5 = 10

Check again: If √100 = 10, then 10 multiplied by 10 should equal 100.

So 10 x 10 = 100

Another method to find the square root symbol is the long division method. This method is used when we cannot apply prime factorization to large numbers or the number under the root symbol is an imperfect square.

List of Square Roots:

Below is the list of square roots of some numbers that students can use to solve the problems based on them.

In mathematics, a square root of a number x is a number y such that y2 = x; in other words, a number y whose square (the result of multiplying the number by itself, or y⋅y) is equal to x.

Type The Squared Symbol
Type The Squared Symbol

For example, 4 and −4 are square roots of 16 because 42 = (−4)2 = 16. Every nonnegative real number x has a unique nonnegative square root, called the principal square root, starting with {\displaystyle { \sqrt {x}},} {\displaystyle {\sqrt {x}},} where the symbol {\displaystyle {\sqrt {~^{~}}}}{\displaystyle {\sqrt {~^{~} }}} becomes root sign or called radix.

For example, the principal square root of 9 is 3, which is denoted by {\displaystyle {\sqrt {9}}=3,}{\displaystyle {\sqrt {9}}=3,} because 32 = 3⋅3 = 9 and 3 is nonnegative.

The term (or number) whose square root is being considered is called the radical. The radicand is the number or expression under the root sign, in this case 9.

Lessons on Square Roots

The main square root function {\displaystyle f(x)={\sqrt {x}}}f(x)={\sqrt {x}} (usually simply called the “square root function”) is a function that forms the set of nonnegative real numbers on themselves. Geometrically, the square root symbol function maps the area of ​​a square to its side length.

The square root of x is rational if and only if x is a rational number that can be represented as the ratio of two perfect squares. (See square root of 2 for proofs that this is an irrational number, and squared irrational for a proof for all non-square natural numbers.)

The square root function maps rational numbers into algebraic numbers, the latter being a superset of the rational numbers).

Square Roots of Positive Integers

The square root of a non-negative number is used in the definition of the Euclidean norm (and distance) and in generalizations such as Hilbert spaces.

It defines an important concept of standard deviation used in probability theory and statistics.

Square Roots of Positive Integers
Square Roots of Positive Integers

It has a large use in the formula for roots of a quadratic equation; Quadratic fields and rings of square integers based on square roots are important in algebra and used in geometry. Square roots appear frequently in mathematical formulas elsewhere, as well as in many laws of physics.

A positive number has two square roots, one positive and one negative, that are opposite to each other. When we talk about the square root of a positive integer, we usually mean the positive square root.

The square roots of an integer are algebraic integers—more specifically, square integers.

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