Disc jockey Alan Freed uses the term rock and roll to describe R&B, in an effort to introduce the music to a broader white audience.
The release of "Rocket 88", a song by Jackie Brenston and the Delta Cats. Some music historians consider this record to be the first rock and roll recording.
... equation is now in a form in which we can conveniently complete the square[?]. To "complete the square" is to add a constant (i.e., in this case, ...