Solve a quadratic easily, and without that darned formula.

[KX4QC]

Radio is full of equations that have a squared term in them: "Twinkle twinkle little star. Power equals I²R."
A general form of such a quadratic would be ax² + bx + c = 0 , and we'd solve it by applying a big formula learned by rote -you do remember it, right?

Fortunately there's an easier way, but nobody ever told me in school that this is a new and easier way to do it:

Mathematician Finds Easier Way to Solve Quadratic Equations.pdf

Much math instruction is so much better than my old schooldays, notably now including matrix concepts and operations. All very good until you actually have to use these things, and we do the mechanicals of calculation same ol' way, even though we can now multiply faster and solve x² equations easily -but we don't.

Time to get with the times!