The films are listed with their production year, so for example the Oscar 2000 went to the best actor in 1999.
This award was originally a plaque.
... the left of "=", that will make it a perfect square trinomial of 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 ...