Quadratic Equation lesson 2 In the previous lesson we learned on how to solve an equation. We found three methods to solve the equation. If not visit http://scipsycho.blogspot.in/2016/08/quadratic-equations.html Now, we will go into details about quadratic equation, the importance of parameter a, b and c and other things that are important for JEE aspirants. Let's begin. As we saw earlier, a quadratic equation can be represented by ax 2 + bx +c =0. Let's start with 'a'. 1.) Coefficient of x 2 Case 1. : when a < 0 let's inspect the graphical form of the equation. If x -> ∞, only the x 2 term will decide the outcome of the expression as it's magnitude will overwhelm the other factors. Now, as x -> ∞ the value of expression will tend to infinity if a>0. However, a is less than zero therefore, the expression will tend to -∞. when x -> - ∞, x 2 -> ∞, and thus even then the expres...