Updates:
Status: Valid
Labels: Solvers
Comment #1 on issue 4003 by asmeu...@gmail.com: Cannot return general
quartic solution
http://code.google.com/p/sympy/issues/detail?id=4003
What do Sage or Wolfram give? If I remember correctly, there is some term
in the general quartic solution that requires knowledge of what sign
something is. Or something to do with choosing the right cubic or fourth
roots.
But the general solutions should just be
https://upload.wikimedia.org/wikipedia/commons/9/99/Quartic_Formula.svg. I
don't understand why we can't just return that.
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