What is the difference between a quadratic equation and the Quadratic Formula?

A quadratic equation is any type of equation that can be represented as ax2 + bx + c.

Example:

x2 - 20x + 91 = 0.

(a, b, c are known. They are the coefficients.)

The coefficient of x2 is always a here. In this case, 1.

The coefficient of x = b. In this case -20 (remember it's minus not plus).

C is the constant. In this case that is 91.

The quadratic formula is a straightforward (though it may seem complicated at first) formula which can solve any quadratic equation.

http://bit.ly/1bBARRN

There you have an image of the formula.