Status: Accepted
Owner: smi...@gmail.com
Labels: Type-Defect Priority-Medium NeedsReview smichr
New issue 2383 by smi...@gmail.com: sqrt(-2*x*neg) gives wrong expansion
http://code.google.com/p/sympy/issues/detail?id=2383
While working on 1847 I noticed this error. I'll include this with the pull
request there.
>>> from sympy import *
>>> from sympy.abc import *
>>> from sympy import *
>>> n=Symbol('n', negative=True)
>>> sqrt(-2*x*n)
2**(1/2)*(-n)**(1/2)*(-x)**(1/2)
>>> _.subs({x:-1,n:-1})
2**(1/2)
>>> sqrt((-2*x*n).subs({x:-1,n:-1}))
I*2**(1/2)
https://github.com/sympy/sympy/pull/306
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