i dont have that ability to have dual connectors on my video card so can i like buy an Y adapter so that i can display it on two monitors onto my 17" and 15"?
If you do that (is that even possible?), all it will do is make it so that you have the exact same image on both monitors, ie it will be a cloned image.
Best bet is to pick up a cheap PCI video card for your second monitor or better yet, upgrade (funds available of course!).