Q: How do you completely delete an app from your iPad?

To delete an app, press and hold any of the apps and after a couple of seconds or so they should start to shake. Then press the 'x' in the left corner to delete the ones that you don't want, and when you've finished deleting press the home button so as to stop the shaking. If you don't get the 'x' on any of the apps that you've downloaded (you can't delete built-in apps) then check that Settings > General > Restrictions > Deleting Apps isn't set 'off'.

If the app is also on in your computer's iTunes library, then depending upon your sync choices you may also want to delete it from or it might get synced back, or you can remove from your iPad via the iPad device's Apps tab when connected to your computer's iTunes