2.  There are many uses for quadratic equations:  The ellipse, hyperbola and parabola are all quadratic curves – studied by ancient Greeks but no application thereof until Astronomy  What is the shape of Earth’s orbit? Like this, right?

3.  This is what it looks like, but to the naked eye, it appears to be a circle, but it’s not  The shape of Earth’s orbit is just off that of a circle; it’s an ellipse  An exaggerated image of Earth’s elliptical orbit looks like this:

4.  A car’s acceleration is another top application of quadratics  https://www.youtube.com/watch?v=m5_AKjD dqaU