Originally Posted by

**janvdl** If you have the formula: $\displaystyle 2x^2 + 3x + 4$, then the 2 is your a value, the 3 is your b value, and the 4 is your c value.

Like i said before: quadratic equations are in the format: $\displaystyle ax^2 + bx + c$

I'm sure you understand that.

The quadratic formula: $\displaystyle x = \frac{ -b +- \sqrt{b^2 - 4ac}}{2a}$

Thats how the formula looks, and you have to learn that format.

Let's say we want to solve that equation at the top that i used to explain.

Then wherever there is an a, we substitute it with 2.

Wherever there is a b, we substitute it with 3.

Wherever there is a c, we substitute it with 4.

Do you understand?