google the topic. Lots of examples and videos.
Just like division, finding roots is a guess and subtract method.
It's based on the fact that (a+b)^2 = a^2 + 2ab + b^2
So, you guess a, work out the rest, subtract, and go again.
If that makes no sense, read the online explanations and watch the videos.
find the square root of 20.5209 by division method
1 answer