Comment #5 on issue 4091 by [email protected]: Cannot solve log(x+3) +
log(x-3)=0
http://code.google.com/p/sympy/issues/detail?id=4091
In the solve_ function, it tries to combine all the log terms using
logcombine. I think it is safe to pass force=True in logcombine. Anyways
solve will check if the solution is valid, so this shouldn't be a problem?
When I applied the above changes, solve(log(x+3) + log(x-3), x) works just
fine giving only the valid solution i.e. sqrt(10)
Will this work? So far I couldn't find any tests which fail this.
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