Hi Simon,
Thank you for your answer, I will try the Ansatz and comparison of
coefficients.
To find coefficients a, b, and c I tried to solve a system of three
equations but unfortunately it doesn't work. The system is depicted below:
eq1 = a + b == Rl*Rs*Cc*gm + Rc*Cc + Rl*Cc + Rl*Cl + Rs*Cc + Rs*Cin
eq2 = c + a*b == Rc*Rl*Cc*Cl + Rc*Rs*Cc*Cin + Rs*Rl*Cc*Cin + Rs*Rl*Cc*Cl +
Rs*Rl*Cin*Cl
eq3 = a*c == Rc*Rl*Rs*Cc*Cin*Cl
solve([eq1,eq2,eq3],a,b,c)
Here is the result given by SAGE:
sage: []
Why this systen doesn't work ?
Regards,
Yann
Le mardi 19 septembre 2017 10:23:07 UTC+2, Yann Cargouet a écrit :
>
> Hi everybody,
>
> I would like to factorize a polynomial function of third degree in order
> to obtain the following form:
> (1 + a*s + b*s^2)*(1 + c*s).
>
> Here my test case:
>
> When I use the factor() function there is no change on the expression.
> Which function I have to use to obtain the wanted simplication ?
>
> all my variables are defined with the command var('Cc, Cin,...)
>
> Thanks in advance for your answers
> Yann
>
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