85 BASIC Programming HELP


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85 BASIC Programming HELP



I am writing a large program for my TI-85 in TI BASIC and as one of the
subroutines, I need to find the roots of a function. I know I can use
the poly and solver, but they can be really ineffective. What I need it
to do, is for example,
the program would have a function like y1=x^2-9 with the bounds from -10
to 10 and I would need the calculator to tell me that the roots are -3
and 3, store these into 2 variables and then go on with the subroutine.
The function could be anything from cos x to 34x^2-x^6....any help would
be great
Brian


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