actually this case looks like has some special properties and hence has some roots according to Wolfram:
http://www.wolframalpha.com/input/?i=A*x%5E5%2BB*x%5E4%2BC*x-D%3D0 On Tuesday, January 19, 2016 at 11:41:47 PM UTC-6, Denis Akhiyarov wrote: > > no algebraic roots according to this theorem: > https://en.wikipedia.org/wiki/Abel%E2%80%93Ruffini_theorem > > On Tuesday, January 19, 2016 at 8:37:18 PM UTC-6, Junwei Huang wrote: >> >> Hello, I am new to sympy and try to solve the following equation >> >> import sympy as sy >> A,B,C,D,x=sy.var('A,B,C,D,x',positive=True) >> sy.solve(A*x**5+B*x**4+C*x-D,x) >> >> but got no result. There are no roots, or I used it in a wrong way? Thanks >> >> >> >> -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/3452c681-129d-4259-8df8-5ec23de59984%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
