That looks like a bug.

Aaron Meurer


On Thu, Jun 6, 2013 at 12:55 AM, Abhishek kumawat <
[email protected]> wrote:

> One interesting thing to note here is that *solve('x**5 + x**3 + 1')*shows 
> solution in terms of RootOf, But when we add decimal in the equation
> then it shows *polynomial error*
>
> In [35]: solution = [N(w.n(4)) for w in solve('x**5 + x**3 + 9/2' , 'x')]
>
> In [36]: solution
> Out[36]:
> [-1.21881103515625,
>  -0.358932495117188 - 1.43544006347656*I,
>  -0.358932495117188 + 1.43544006347656*I,
>  0.968338012695313 - 0.865318298339844*I,
>  0.968338012695313 + 0.865318298339844*I]
>
> In [37]: solution = [N(w.n(4)) for w in solve('x**5 + x**3 + 1.5' , 'x')]
> ---------------------------------------------------------------------------
> PolynomialError                           Traceback (most recent call last)
>
> On Wednesday, June 5, 2013 2:46:16 PM UTC+5:30, Abhishek kumawat wrote:
>
>> When i solve  'x**5 + x**3 + 1', it shows solution as
>> [RootOf(x**5 + x**3 + 1, 0),
>>  RootOf(x**5 + x**3 + 1, 1),
>>  RootOf(x**5 + x**3 + 1, 2),
>>  RootOf(x**5 + x**3 + 1, 3),
>>  RootOf(x**5 + x**3 + 1, 4)]
>>
>> How to get solution of this equation using sympy.
>> Image of the same is attached
>>
>>
>> <https://lh6.googleusercontent.com/-X6chv6Uv09c/Ua8ByKhGqYI/AAAAAAAAAEo/wLGSedGo9jg/s1600/rootof.png>
>>
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