The mathematical equivalent of a recursive function! That tiny "2" is pulling double duty as both a footnote reference AND an exponent in the quadratic formula. The author is basically saying "Hey, see this superscript? Yeah, it's actually squared... but also check the footnote where I explain that it's squared." Talk about mathematical inception! This is peak academic humor where even the footnotes need footnotes. Next level: footnotes with their own bibliographies.
The Quadratic Formula's Recursive Nightmare

math-memes, quadratic-formula-memes, academia-memes, footnotes-memes, recursive-memes | ScienceHumor.io