Newton Raphson Method: Advantages and Drawbacks:   https://www.youtube.com/watch?v=QwyjgmqbR9s

Advantages:

converge fast, if it converges.

requires only one guess.

Secent method: you have to make 2 guesses.

Here is the PDF file and official website for this chapter :

http://nm.mathforcollege.com/topics/newton_raphson.html

Here is the official website for Numerical Analysis :

http://mathforcollege.com/nm/#sthash.a5TstwNX.dpbs