la verdad es que las instrucciones son faciles de entender aunque esten en ingles, sino usa un traductor, si sigues sin entender, me parece que no mereces tener root porque las aplicaciones que usan root tambien vienen en ingles en su mayoria
STEP 1:
Turn tablet OFF and restart in download mode by pushing and holding Power & Volume UP/RIGHT buttons at same time. When wording with yellow triangle appears, push Volume down to continue into download (ODIN) mode. Don't plug tablet into computer yet.
STEP 2:
Make sure KIES (if installed) is closed and not running.
Extract Odin3 v1.85.exe and run it.
STEP 3:
Connect tablet to computer.
In Odin, click PDA button. Select GT-P51??_ClockworkMod-Recovery_5.5.0.4.tar file you downloaded and click START button.
Let Odin install files. When it's done installing CWM, box turns GREEN and tablet will reboot.
STEP 4:
Disconnect tablet from computer. Turn tablet OFF and restart in recovery (CWM) by pushing and holding Power & Volume DOWN/LEFT buttons at same time. When Samsung Tab 2 10.1 logo appears, you can release power button but continue holding volume button for a few more seconds. Note: If you've done this on other Samsung devices, you will notice that it takes longer before blue CWM v5.5.0.4 text appears ... just be patient.
Once you are in recovery, use volume button (UP/DOWN/LEFT OR RIGHT) to move around and POWER button to select an option.
Select install zip from sdcard. Choose cwm-root-gtab2.zip (or cwm-root-gtab2a.zip) file you already copied to root of sdcard.
When rooting is finished, choose reboot system now from CWM menu.
DONE !