Factoring in CAS

[Brian Zilli]

It sounds like you may have a value stored in the x variable, so when you factor, the CAS plugs that in first and then complains that it isn't a polynomial.

If you press the [Vars] key, then the "CAS" soft-menu key at the bottom of the screen, Then "All", it will show a list of variables you've assigned.

You can either hit the backspace/delete key with x selected in that menu, or run the command purge(x) to remove the assignment.

Alternatively, if you want to keep what you have stored in x, you could run the factor command with another variable.