square root

[quincydavis]

is there a formula formula for working out square roots

[Breton]

Try http://www.homeschoolmath.net/teaching/square- root-algorithm.php

Found with Google!

[factor-fiction]

Easiest method to find square root of N is to take make a good an approximation (X) as possible. Then do this calculation:

((N/X) +X)/2 <----- call this answer A.

For further accuracy repeat the process but use the
formula:
((N/A)+A)/2 <-------- The answer should be the square root of N accurate to a few decimal places.

Sounds complicated? Try this for square root of 40 (for which answer is 4.472)

Start with estimate of 4
((20/4)+4)/2=4.5
((20/4.5)+4.5)/2= 4.472

the rule can be described as divide your number by your estimate, add your estimate, then divide by 2.

[factor-fiction]

Maths is good but can't type. My example should have said square root of 20

[Jugglering]

LOL factor30 - my maths is slightly different to yours.... I get the square root of 40 to be 6.32...... I think you really meant the square root of 20

[Jugglering]

Hehe factor - snap !

[CheekyChops]

The easiest and quickest way that I have found...

...is to use the square root button on your calculator!

[quincydavis]

thanks for everyone that replied its now as clear as mud