I’ve just finished updating my quadratic discriminants applet. It is larger, more informative, and is in the two usual formats, dark on light background or light on dark background. It draws the graph of the function on coordinate axes, gives solutions, in surds (radicals) if necessary, of the equations.
It also uses my recently-developed drag-boxes to change the values of the parameters. These are simply a box on screen with a number inside: if you click the number it increases as you drag right or decreases as you drag left. I hope that once you’re used to it works much more quickly than the old buttons. I’m quite proud of these boxes!
The applet can also be used to demonstrate the complex conjugate roots that equations have when the discriminant is negative. This is useful for more advanced students, studying (UK) Further Mathematics (FP1) or (US) 10th grade+ (Number) Mathematics.
Enjoy playing around with this new version, and let me know what you think.