How to draw a graph of a quadratic function

1. You have to find intercept point of  using factorization or ABC formula.

2.       You have to find intercept point of  where

3.       Then, you have to find out the extreme point of. For

4.       Sketch axis, after that you have to plot the point and connecting to other point. You have to draw smooth curve to connect that points.

NB: you have to remember if the Constanta of  is positive, so the graph is up word and if it negative the graph is down word.