Updates:
Status: Valid
Labels: Assumptions Solvers Simplify WrongResult
Comment #1 on issue 4011 by [email protected]: Solutions for cubics
http://code.google.com/p/sympy/issues/detail?id=4011
Regardless of the form of the solutions, ask should not return wrong
results.
As to the form of the solutions, it probably could be simpler. But also
note that while it is mathematically true that every cubic with real
coefficients has a real root, and that the roots of every cubic can be
expressed in radicals, it is not true that the real root can always be
expressed in terms of radicals not containing sqrt(-1).
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