The Day The Music Died is the title given to February 3, 1959. On the night of February 2, Buddy Holly, Richie Valens and The Big Bopper (J. P. Richardson) were killed when the plane they were on crashed en route to a gig in Fargo, North Dakota. Most people heard the news the next day, and so February 3 was given the title.
... left side is now a perfect square; it is the square of (x + b/(2a)). The right side can be written as a single fraction; the common denominator is 4a2. ...