I'd like to know how to find the root of a polynomial on my TI-84 Plus without this "Polynomial Root Finder and Simultaneous Equation Solver" app. The reason is that the app's not in my calculator and I can't transfer the app to my calculator. I keep getting an "Access Denied" error message and it seems that my calculator has a mind of its own because I hear the dinging and the donging my computer makes whenever a USB device connects or disconnects. Maybe I'll see if I can get the app from my friend Luke when school starts. Anyways, is there any way to find the roots of a polynomial without the app?