If you reset the iPad the way the deggie suggested and Bing is still there, clear Safari, close the app and then reset the iPad again.
Settings>Safari>Clear History, Cookies and Data. Now close Safari.
To close an app, drag the app up from the multitasking display. Double tap the home button and you will see apps lined up going left to right across the screen. Swipe to get to the Safari app then swipe "up" on the app preview thumbnail to close it.
Reset the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider if it appears on the screen - let go of the buttons. Let the iPad start up.