Can not delete applications from samsung Galaxy Ace

[ttaghattass]

Hi
I purchased a new samsung Ace and I found 3 applications I did not want it on my cell so I tried to deleted them or uninstall them but no way
I tried by rooting my cell also no way
they are read only and I can not change their mode
what I can do???????
thanks

 

[sandraa2]

Are those the ones that came with the phone?