High School Math Solutions – Quadratic Equations Calculator, Part 3

On the last post we covered completing the square (see link).  It is pretty strait forward if you follow all the steps (there are quite a few steps).

To make things simple, a general formula can be derived such that for a quadratic equation of the form ax²+bx+c=0 the solutions are x=(-b ± sqrt(b^2-4ac))/2a. The quadratic formula comes in handy, all you need to do is to plug in the coefficients and the constants (a,b and c). One thing to note, you must memorize the formula, it is not as intuitive as factoring or completing the square.

Let’s see how it works (click here):

Here’s an advanced example that involves complex numbers (click here):

We’ve got you covered; that was the last on the Quadratic Equations series. Now you know everything there is to know about solving quadratic equations.

Cheers,
Michal