Archive
29th of March 2017
Mathematics
Q:

how to take out square root of an number.

Shreyash Nayak - CBSE - Class VIII

Wednesday, March 29, 2017 at 12:01:PM

A:

Hi Shreyash,

To find the square root of a number, find the prime factorisation of the number.

Then club each like pair of prime factors and bring one of them out of the square root, and then multiply the numbers 

removed out.

Example: begin mathsize 12px style square root of 144 equals square root of 3 cross times 2 cross times 2 cross times 3 cross times 2 cross times 2 end root equals square root of 3 cross times 3 cross times 2 cross times 2 cross times 2 cross times 2 end root equals 3 cross times 2 cross times 2 equals 12 end style

Wednesday, March 29, 2017 at 15:30:PM