Fluxbox is a window manager for the X Window System that is based on Blackbox 0.61.1. It aims to be lightweight and highly customizable, with no built-in support for graphical icons, and only basic interface style capabilities. Instead, hotkeys[?], tabs[?], and simple menus are used as interfaces.
... the square[?]. To "complete the square" is to add a constant (i.e., in this case, a quantity that does not depend on x) to the expression to the left of "=", that will make ...