A Rondeau is also a baroque dance, often incorporated into a suite. Its origins are French.
The word is also used to refer to a musical form[?], also known as rondo.
... the form x2 + 2xy + y2. Since "2xy" in this case is (b/a)x, we must have y = b/(2a), so we add the square of b/(2a) to both sides, ...