Quadratic equations can be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each

Quadratic equations can be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods? When might each method be most appropriate? Which method do you prefer? Why?

By graphing method:We need to draw the graph of the function and look upon where it cutsthe axis of X, those will be root..Sometime it is not possible to find out where it cuts the X axis....