Re: NSolve unable to find all possible roots

*To*: mathgroup at smc.vnet.net*Subject*: [mg115621] Re: NSolve unable to find all possible roots*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Sun, 16 Jan 2011 05:55:54 -0500 (EST)

There is only the root x = 0. Note that the argument of Sqrt[-13.319-x^2] is always negative so its value is always complex. Bob Hanlon ---- Luiz Melo <luiz.melo at polymtl.ca> wrote: ============= Dear mathgroup, The equation below has three possible roots, namely: 0., 1.99, -1.99. eq = x*(Sqrt[-13.319 - x^2] + 2.41*Sqrt[1.004 - x^2]) If we try NSolve[eq == 0, x], we get {{kx-> 0.}} only. How to instruct NSolve to search for the other two roots of the above equation? Thank you Luiz Melo