Comment #13 on issue 604 by [email protected]: write tests for p =
x**3+2*x**2+8; r = roots(p, x);
http://code.google.com/p/sympy/issues/detail?id=604
You can even just do
>>> [p.subs(x, ri).n(chop=True) for ri in r]
[0, 0, 0]
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