Let XY be a tangent to a circle, and let XBA be a secant of the circle, as shown below. If AX = 15 and XY = 6, then what is AB?

https://artofproblemsolving.com/texer is the diagram.

PLEASE HELP

By power of a point, AB = 40/3.

That is incorrect, sorry!

Can anyone else help?

BUMMPPPPPPP plpease