Issue 1158: regression: roots of polys
http://code.google.com/p/sympy/issues/detail?id=1158
New issue report by goriccardo:
The new Poly class introduced some regressions on roots function.
e.g:
This doesn't works:
In [1]: p1 = ((x-2)*(x+3)*(x-4)).expand()
In [2]: p1
Out[2]:
2 3
24 - 10⋅x - 3⋅x + x
In [3]: roots(p1,x)
Out[3]: {}
This works:
In [4]: p2 = ((x-1)*(x+3)*(x-4)).expand()
In [5]: p2
Out[5]:
2 3
12 - 11⋅x - 2⋅x + x
In [6]: roots(p2,x)
Out[6]: {1: 1, -3: 1, 4: 1}
Issue attributes:
Status: Accepted
Owner: ----
Labels: Type-Defect Priority-Medium
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