What Is The Square Root Of -2, How To Find The Square Root Of 2

The square root of 2 or root 2 is represented using the square root symbol and written as √2 whose value is 1.414. This value is widely used in mathematics. Root 2 is an irrational number as it cannot be expressed as a fraction and has an infinite number of decimals. So, the exact value of the root of 2 cannot be determined.

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Root 2 Value

The square root of 2 is the number which when multiplied with itself gives the result as 2. It is generally represented as √2 or 2½. The numerical value of square root 2 up to 50 decimal places is as follows:

At present, the root 2 value is computed to 10 trillion digits. For general use, its value is truncated and is used as 1.414 to make calculations easy. The fraction 99/70 is also sometimes used as the value of √2.

How to Find Square Root 2

To find the square root value of a number, we usually check if the number is a perfect square or not. It is easy to find the root of perfect squares, but for non-perfect squares, we have to use the long division method to find the root value. Numbers like 2, 3, 5, 20, etc. are non-perfect squares, but 4, 9, 25, etc. are perfect squares, which gives the whole number when we take the root of them.

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Value of Square Root of 2 by Long Division Method

Now, how to find the square root of 2 by division method. The first thing that you can try is the popular division method. The steps involved in this method are:

Step 1: In this method, you have to make an estimate first, means you have chosen a close number by finding at-least two roots which are perfect. It has been those roots that your number is between those values.

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Step 2: Then, you can divide the number by one of those square roots.Step 3: Once you start and continue with the division process, you will need to take the average of the result of step 2 and the root. And finally, you can use the result that you get in step 3 to repeat the 2nd and 3rd step until you get a number that is satisfactory or accurate enough for you. The example is given below:


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