[geogebra-dev] Re: Improving MathPiper's Factor()
- From: Markus Hohenwarter <markus@xxxxxxxxxxxx>
- To: geogebra-dev@xxxxxxxxxxxxx
- Date: Mon, 22 Jun 2009 13:59:56 -0400
Dear Sherm,
thank you, this is very interesting, I'll definitely have a play with this.
Best wishes,
Markus
On Mon, Jun 22, 2009 at 13:57, Howard Ostrowsky<shermost@xxxxxxxxx> wrote:
> Here is a short session from MathPiper, showing how one can post-process a
> common type of incomplete or confusing result from the Factor() function.
> Hope this is helpful to some.
>
> MathPiper version ".75c"
> In> u
> Result> 2*a*x^2-4*a*x+2*a
> In> Factor(u)
> Result> FWatom(2*a*x^2-4*a*x+2*a)
> COMMENT: Not very helpful!
> In> Listify(%)
> Result> {FWatom,2*a*x^2-4*a*x+2*a}
> In> fu:=%[2]
> Result> 2*a*x^2-4*a*x+2*a
> COMMENT: Better, but still not factored!
> In> fc:=Gcd(Coef(fu,x,0 .. 2))
> Result> 2*a
> COMMENT: This discovers the constant factors
> In> fc*Factor(Simplify(fu/fc))
> Result> 2*a*(x-1)^2
> COMMENT: Now, it's fully factored.
>
> Sherm
>
--
Markus Hohenwarter, PhD
Florida Center for Research in Science, Technology, Engineering, and Mathematics
Florida State University, www.fcrstem.org
GeoGebra: www.geogebra.org
IGI: www.geogebra.org/IGI
CPALMS: www.cpalms.org
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