I have an expression obtain from an integral, which is:

Integrate[\[Epsilon]^2/Sqrt[(\[Epsilon] - u)^2 +
         \[CapitalDelta]^2], \[Epsilon]] // FullSimplify

The result have an obvious common factor

Sqrt[\[CapitalDelta]^2 + (u - \[Epsilon])^2]

How can I let mathematica to cancel this common factor? I have tried Cancel and Refine all the variables to be positive.