1. DOWNLOAD iroot /vroot
2.Use ur usb cable and connect ur phone to pc
3. Put ur phone in usb debugging mode available in developer option
4. IF u dont have developer option then go to setting->about phone and continously click build number till you get notified.
5. And open vroot and let it detect ur phone. It will ask permission so give permission from ur tablet. It will download and install some drivers.
6. U can see there is a option to root ur phone go ahead and click it
7. Ur tablet may restart so don't. Pannic
Volla rooted ur iball