Quadratic Inequalities

Investigating Regions of Quadratic Inequalities
Use the Geogebra file to investigate the nature of quadratic inequalities. What happens as you change the value of 'a'? By using the check boxes look at what is happening with the regions. Can you explain what is happening? Where are the values in the inequalities coming from? How could you find them out if you were given the equation of the quadratic? Can you find a time where the file gives you the wrong inequality?