Re: Can TI-85 calcs FOIL?
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No, the TI85 can not do symbolic solutions unless you have an additional =
software program for it that adds that capability.=20
x^2 + 25 does have factors, but they are (x + 5i)(x - 5i), not what's =
listed below.
=20
x^3 + 5x + 25 also has factors too:
(x + 2.3625656590074)(x^2 - 2.3625656590074x + 10.581716493121)
(the numbers are rounded off at 12 digits)
Anyone who wants to do symbolic solutions and doesn't have a TI92 but =
has a PC running windows, you can get a FREE math program called =
"Solutions" at: http://www.qbc.clic.net/Elan
Solutions can give symbolic or numeric answers. It also will work in =
RPN mode and graphs in color.
----------
From: Johnny "Big Dog" Miyares[SMTP:jmiyares@mdihs.u98.k12.me.us]
Sent: Monday, November 25, 1996 7:42 AM
To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: Can TI-85 calcs FOIL?
On Fri, 22 Nov 1996, Goatboy wrote:
> Can the 85 do:
>
> from this: x^2+25
> to this?: (x+5)(x-5)
>
> or more complicated like this?: x^3+5x+25
>
> ...or do I have to find a seperate prog online?
>
Goatboy,
Try finishing Algebra before asking questions like this. x^2 + =
25
does not factor as you suggest, and x^3 + 5x + 25 does not factor at =
all.
I've tried to tell you what it does. It can find roots, but not
factors directly...I've tried to tell you this on the side, you haven't
either understood, or listened. For algebra questions, learn algebra
first. Then consult either the manual or your high school teachers.
-- JBD
References: