[Gambas-user] function that finds that value for which an expression = 0

[Tobias Boege]

On Tue, 11 Jun 2013, Ru Vuott wrote:
> Hello,
> 
> an our friend of italian Gmabs forum asks me to send to this Mailing list a question:
> 
> **********************
> 
> I have an expression (example:+7*(x^3)+6*(x^2)-6*(x^1)+4*(x^0)) as expression (gb.eval) or string and I ask if you can find the value of x for which the expression = 0
> 
> **********************
> 

First of all: what is that for a kind of question? Of course can we find
that x! It's near x = -1.60999. Next time he should google the result or
let wolframalpha calculate it...

I really detest doing this but: maybe I should guess a little more about
what your question was meant to sound like... Do you want an algorithm to
compute/approximate the root of a polynomial in Gambas? How about the
bisection method? Sample project attached - which is far from ready to be
used. It hangs with something like x^2-10. Guess why! :-)

Regards,
Tobi
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