all you need is your charger and do A's il will tel you:
1) plug the charger.
2) press power and volume down at the same time until the tablet power off, fast change presssing from volume down to volume up and let you finger un the power botton until you Sée the sumsung logo un the screen and take off your fingers at the same time.
3) in the recovery mode find wape data factory reset and click on it and conferm your chose.
4) then click reboot you tablet.
now its done.