How do you find the square root of 121? Medal for fast help! :)

Question

anonymous · Answer

Answer: 11

hannaha · Answer

thanks, any way you could summarize how to figure that out?

anonymous · Answer

first find all odd or even prime factors for given no.
then on applying square root we get the required value

hannaha · Answer

what does applying square root mean?

hannaha · Answer

1, 11 and 121 are the prime factors of 121

anonymous · Answer

Just now that 10 * 11 is 110 so if you add 11 more you get 121 so therefore you now that the answer is 11 * 11

hannaha · Answer

okay so basically square root is what number times itself can equal the given number?

zarkon · Answer

the square root of 121 is 11 and -11

$b$ is the square root of a number $a$  if $b^2=a$

since $11^2=121$ and $(-11)^2=121$ both 11 and -11 are square roots of 121

hannaha · Answer

Okay :) Thanks!