[TI-M] Re: Polynomials, factors and division & 89/92+, SOLVED


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[TI-M] Re: Polynomials, factors and division & 89/92+, SOLVED




If the 82 has the other matrix functions (like row+() and row*() ) then
it would be fairly easy to make your own rref(). I don't know if this is
useful, since I don't know if you can rref a matrix that can't be inverted
(^-1).

Rob van Wijk

> 
> I don't remember the exact equation, but I know it was a polynomial.  
> Polynomials can't be solved with matrices (at least as far as I know).  
> Also, the 82 doesn't have a CAS:  it won't do something in terms of a 
> variable.  One more thing:  the 82 doesn't have a rref() function (stupid,
> isn't it).  You have to write a program on your own to solve matrices that
> won't work with the ^-1 method.
> 
> 
> >From: Rob van Wijk <robvanwijk@gmx.net>
> >Reply-To: ti-math@lists.ticalc.org
> >To: ti-math@lists.ticalc.org
> >Subject: [TI-M] Re: Polynomials, factors and division & 89/92+,  SOLVED
> >Date: Tue, 19 Feb 2002 09:50:18 +0100 (MET)
> >
> >
> >Again, I'm not sure about the 82, but on the 83 it's easy.
> >
> >Say, you want to solve this system:
> >4x+3y=19
> >6x+9y=51
> >
> >You type in "rref([[4,3,19][6,9,51]])"
> >The answer will be [[1,0,1][0,1,5]], which means
> >1x+0y=1 (x=1)
> >0x+1y=5 (y=5)
> >
> >Rob van Wijk
> >

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