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- From: TOBIAS@bonnie.physik.uni-stuttgart.de
- Newsgroups: comp.sys.hp48
- Subject: Re: Complex roots for 3rd and 4th order equations
- Message-ID: <1992Nov6.123748.4019@news.uni-stuttgart.de>
- Date: 6 Nov 92 12:37:48 GMT
- References: <1992Nov4.003713.11346@coe.montana.edu>
- Sender: news@news.uni-stuttgart.de (USENET News System)
- Organization: Physics Dept, University of Stuttgart, FRG
- Lines: 22
- In-Reply-To: nate@nate.oscs.montana.edu's message of Wed, 4 Nov 1992 00:37:13 GMT
- X-News-Reader: VMS NEWS 1.24
-
- In <1992Nov4.003713.11346@coe.montana.edu> nate@nate.oscs.montana.edu writes:
-
- > Forgive me if this is a simple question, but a friend of mine has a TI-68
- > which can solve 3rd and 4th order equations, and I can't get my 48SX to
- > give me more than one solution to the equation, and that root is always real.
- >
- > Is there an easy way to do this, or even a difficult way to do this?
- >
- > It's kind of embarassing to be outdone by a $35 calculator.
- >
- > Thanks,
- >
-
- No problem. You only have to put the formulas for the roots into your
- computer. They can be found in every mathemtical standard lexica.
- I think the 4th order case is labeled "formula of ferrari".
-
- But if you need them (of course they are a little bit long) in
- a executable HP format i can send you (or post) the 2 programs. I use them
- in order to get the eigenvalues of 3 and 4 dim. matrices.
-
- Bye. Tobias.
-