Re: Can TI-85 calcs FOIL?


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Re: Can TI-85 calcs FOIL?



<Andy Johnson <prjohnson@sisna.com> had this to say>


> Caitlin Keidel wrote:
> >
> > >from this: x^2+25
> > >to this?: (x+5)(x-5)
> >
> > Not to be a pest or anything but x^2+25 does not factor into (x+5)(x-5).
> >
> > The correct equation is: x^2-25
> >
> > --Caitlin
>
> Or the correct factors are (x+5i)(x-5i).
>


Where did the 'i',s come from?






Assume a vitue if you have it not.


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Wild Bill
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