laplace transform of dirac function

why is it that when im trying to find the laplace transform of a dirac function using the command

laplace(dirac(t+2)),

im getting an answer 0 shouldnt i be getting exp(2*s)? or there is problem since that "c" variable has negative value?

Answer 1

[Torsten]

syms t s
laplace(dirac(t + 2), t, s)

Best wishes

Torsten.

[Torsten]

It will give zero because the mass is concentrated at t=-2 whereas the integral is taken between 0 and infinity.

Best wishes

Torsten.