XP and Scrum Relationship

XP and embracing change

XP sees the feedback as only useful if it's fast and early, it needs the customer to be always available.

XP and Scrum

XP without Scrum Works, Scrum without XP does not.
So why Scrum?
Scrum's original intent was to make something that was agile into something more palatable to business'. So it turned agile into something around agile, instead of being agile.