Depassing 15V on Operational Amplificator?
I'm assuming you mean "exceed" instead of "depass"? The latter isn't a word in common English use.

The voltage relation shown is for a non-inverting op amp (yes, using negative feedback). The  output is always limited by the supply voltage; often to a value just a bit below the supply voltage. The supply, however, could be 30V (if allowed by the op amp selected).