Yes, 0 must be removed of roots sets. when you ask for support, please post all content of sage cell, like this :
solve([(4*x+5)/(x^2)>=4/(x+5)],x) There are many posts like yours (for quadratic equations ...) but the current status is wrong (or no result) computations for "special" symbolic expressions, even if you try to force the domain of roots like, x = var('x',domain="real") It's because some limits of the simplifying symbolic code .. even some formula like sqrt(x^4) is not simplified to x^2 (try: f(x) = sqrt(x^4) ; print "f : ",f.factor() ... or expand() or simplify() I always "help" the software simplifying,....usually writting in polynomial form and then factor. It can be very painful, especially for mathematics where quadratic equations or inequations appear like in cartesian coordinates plane geometry. Dominique -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.