Square Root Of 12

Square root of 12 and other numbers like 2, 3, 5, 6, 24, 13, 125, etc. are little typical to simplify, as these numbers are not perfect squares. But numbers like 4, 16, 25, 81, 121, etc. are the perfect squares and its easy to estimate the square roots.  We get square of a number when we multiply the number to itself. Let us first take the examples of a few squares.

For example,

112  = 11 × 11 = 121

92 = 9 × 9 = 81

52 = 5 × 5 = 25

Therefore, in the above examples, 11, 9 and 5 are the square numbers. But if we have to find out that a number is a perfect square or not, we need to check the unit place of the number.

  • If at the unit place, number ends with 2,3,7 and 8, then the number is not a perfect square.
  • If at the unit place, number ends with 1,4,5,6 and 9, then the number is a perfect square.

The square root is represented by the symbol, ‘√’. This symbol ‘√’ is called a radical symbol or radix. The number underneath the radical symbol or radix is called as radicand. Apart from representing the value of root 12 in radical form, it could be represented as in decimal form.

 

Simplification

The root of 12 is represented in the form of √12. Number 12 is an even number and not a prime number. Prime numbers have only two factors, 1 and the number itself, such as 1, 3, 5, etc. But as we know, 12 have six multiple factors, 1,2,3,4,6 and 12 itself, such as,

1 × 12 = 12

2 × 6 = 12

3 × 4 = 12

4 × 3 = 12

6 × 2 = 12

12 × 1 = 12

But the question comes, how can we find out the square root value of 12? First, let us write the factors of 12 as given below.

12 = 2 × 2 × 3

You can see, in the above expression, there is only one square number available on the right-hand side. Therefore, the value of root of 12 can be written as;

Square root of 12

Taking out the square term out of the root we get,

√12 = 2 √3

This is the radical form of √12. We can also write it in decimal form, by putting the value of √3 which is approximately 1.73. Hence,

√12 = 2 × 1.73

√12 = ±3.46 approximately.

Like 12, there are also many numbers which are not perfect squares. For example, 18, 20, 27, etc. are not perfect squares, as they give the value in radical form or in decimal form.

Download BYJU’S – The Learning App and learn to find the squares and roots of numbers with the help of interactive videos.

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