That’s software development for you. Why is that weird value there? Because some guy, at some point, had checked for that and somehow it’s still relevant.
I know of a system that churns through literally millions of transactions representing millions of Euros every day, and their interface has load bearing typos (because Germans in the 90s were really bad at the Englishs).
Maybe you were just at a bad school? Quadratic equations are mandatory in Germany even for the lowest level of graduation.
Until my Abitur (12th grade) I learned about equations, stochastics, integrals and derivatives, vector stuff, etc.