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comparisations

comparisations

comparisations

(OP)
Is it possible to solve comparisations in mathcad?
ex : x³ +5x² +x +7 = 0
Thanks a lot

rbergiers@hotmail.com

RE: comparisations

If your after the roots of the polynomial listed in your thread, the answer is yes.  Use the polyroots function in Mathcad to solve for those.

RE: comparisations

A program called MATHSERV is available at:
http://www.engs-comp.com/mathserv/
where ordinary BASIC code can be typed in any word processor and the results are typed back into the document.

I would enter the function:
FX = "(x^3 + 5*x^2 + x + 7)"

Then I would find the high-low range of roots:
graph(FX, -10, 5)
(the results of the "graph" function can't be posted here)

Then I discover there is only one result:
RES = bisect(FX,-7,-5,.0001) := -5.0748

Regards, Helmut

RE: comparisations

Define the function

f(x) := x3+5x2+7

make a guess  

x:=-1

Use the root function

R:=root(f(x),x)

Steven van Els
SAvanEls@cq-link.sr

RE: comparisations

Go to "Resource Center" Icon. Click in "Solve Equations" and open the example " open the Quick Sheet "Finding the Root of a Polynomial".

There are other examples that could be useful for your purpose.

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