it is possible, but a majority of the members on this site recomend against it.
many times one is overly aggresive towards the other and that just makes for a rotten life, dont you think?
many people will look at the male jumping on the female and biting her and say "oh, thats normal. they do that in nature". but seriously, if you had a choice, wouldnt you rather live a care free life, having the entire basking spot to yourself without a "friend" to constantly bite and dominating you? if you watch a pair of captive dragon, one usually blocks the others light by constantly laying on them. i used to think it was cute until i realized it was the sign of a possesive male.
i rescued a pair and seperated them as soon as i could afford it; the female was happy as a clam but the male was ticked he didnt have anyone to push around anymore...