Square root of 4
If you are wondering what the square root of 4 is, it is exactly 2. The square root of a number (4 in this case) is a value (2 in this case) that, when multiplied by itself, equals the original number (4). Mathematically, the square root of 4 can be expressed in either radical or exponent form:
-Radical form of the square root of 4: √4
-Exponent form of the square root of 4: 4^(1/2) or 4^(0.5)
The radical sign or radix is the term used to refer to the symbol √. The number being calculated for its square root is called the radicand, which is the number under the radical sign (radix) in this case.
-Radical form of the square root of 4: √4
-Exponent form of the square root of 4: 4^(1/2) or 4^(0.5)
The radical sign or radix is the term used to refer to the symbol √. The number being calculated for its square root is called the radicand, which is the number under the radical sign (radix) in this case.
Calculator for Square Root of 4
If you want to calculate the square root of a number, including the value of the square root of 4, you can use a square root calculator.
Square Root Calculator
Calculation Guide of Square root of 4
In the following sections we explain how to calculate the square root of 4. We will address frequently asked questions, such as "Is the square root of 4 a rational or irrational number?" and “is 4 a perfect square?” Our primary focus of discussion will be on the square root of 4.
You will find all the information you need on the square root of 4 calculations below.
You will find all the information you need on the square root of 4 calculations below.
What is the square root of 4?
The square root of 4 is a number which multiplied by itself equals 4. Therefore, the square root of 4 is 2, since 2 x 2 = 4.
Therefore,
ANSWER: Square root of 4 = √4 = 2
Therefore,
ANSWER: Square root of 4 = √4 = 2
Is 4 a Perfect Square?
A number is considered a perfect square if it is a product of squaring a whole number (called integer). 0, 1, 2, 3, 4, 7, 8, and 9 are all whole numbers (same as integers). Numbers such as -5, 7.025, or 5 ½ are not whole numbers. Remember squaring is when a number is multiplied by itself. For example, 81 is a perfect square because it is a product of 92 which is the same as 9×9. Notice 9 is a whole number (integer).
In our example the square root of 4 is 2, which is a whole number. Therefore, 4 is a perfect square.
ANSWER: 4 is a perfect square.
In our example the square root of 4 is 2, which is a whole number. Therefore, 4 is a perfect square.
ANSWER: 4 is a perfect square.
Is the square root of 4 rational or irrational number?
A number is rational when it can be made by dividing a whole number by a whole number. A whole number which is also called an integer does not have a fractional part itself. Simply said, a number is rational if it can be written as a fraction.
In our case, the square root of 4 is 2, which is a whole number. The square root of 4 can be expressed as a whole number, which means that it is a rational number.
ANSWER: The square root of 4 is a rational number.
In our case, the square root of 4 is 2, which is a whole number. The square root of 4 can be expressed as a whole number, which means that it is a rational number.
ANSWER: The square root of 4 is a rational number.
Principal square root of 4
Every positive number has two square roots. One of the square roots is positive and another one is negative. For example, the square roots of 4 are -2 (negative) and +2 (positive) because (-2)^2=(+2)^2=4. The positive square root is denoted as "the principal square root". Typically, when we are calculating "the square root of a number" we mean the principal square root. In our case, it is positive 2 or +2 which is written as √4=2. As you may know, if there is no minus (-) sign before a number it is a positive number.
Therefore, the principal square root of 4 is √4=2.
Therefore, the principal square root of 4 is √4=2.
