Problem with Laplace transform

[Natoe]

Thanks ! , but for the U(t) like in this exemple :

http://image.noelshack.com/fichiers/2016...-titre.png

U(t) on Hp prime = "1" because U(t) = 1/P and when i did : "ilaplace(1/p,p,t)" the result is "1"

So i did on the hp prime :"Laplace((1+(t-2)².1(t-2),t,p) for the exercice and the result is wrong or not the same ...

And thanks for your answer !