Quadratic formula

Today's comic is about the derivation/proof of the quadratic formula. Enjoy!


The quadratic formula comes in very useful for solving quadratic equations, and it will always give the right answers. It is often first taught without any explanation of why it works. This can frustrate the students who want to know why it works and see the real maths behind it. I know that not everything students are taught in maths can be proved to them, since if we did that, we'd never get anywhere. However, I don't think it is too much to ask that students get to see some of the simpler and easier to follow proofs for the most important concepts, and quadratics are definitely one of those important concepts.

If this comic has helped you, or made you laugh, or made you happy in some other way, then please consider donating so that I can continue drawing these comics.

You can donate here