Question

How to find square root? Plz tell me a simple way to do it!!

Answer 1

U can find square roots by prime factorisation & long devision , I am explaining you prime factorisation ,


Like , we have to calculate √16 , so we'll do it as ,

2 | 16
2 | 8
2 | 4
2 | 2
| 1

Now make pairs of same numbers , like in this all are 2's so making pairs & write the number only 1 time of the pair , like here we are getting 2 & 2 ,

Just multiply them = 2×2 = 4

so , √16 = 4

Answer 2

You can find square root by the prime factorisation method.

For example: 25

5 | 25
5 | 5
| 1

So,25=5×5.

Now ,you have make a pair of same prime numbers, like 5×5 is one group,and then take one prime number out of it and that is your answer.From 5×5 take one 5 out and then that is your asnwer.

So √25=5

One more example.

400

2 | 400
2 | 200
2 | 100
5 | 50
5 | 10
2 | 2
| 1

400=2×2×2×5×5×2

Like I said, make pairs of same prime numbers together.

So, 400=2×2×2×2×5×5

After making groups, take one prime number out of each group and multiply them.

2×2×5

20

So √400=20

This can be done only in the case of perfect squares, if one number is left out,then simply understand that its square root is in decimals