"Hangar 18" has a riff also used by Metallica, in "Call of Ktulu", from Ride the Lightning, which was written while Dave Mustaine was a member of Metallica.
... 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 of b/(2a) to both sides, ...