Q: Solve gives complex solution where there is a noncomplex solution how to get the last one?

*To*: mathgroup at smc.vnet.net*Subject*: [mg50300] Q: Solve gives complex solution where there is a noncomplex solution how to get the last one?*From*: "Dick Barends" <dick.barends at wxs.nl>*Date*: Thu, 26 Aug 2004 06:50:41 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hello, The following line Solve[x y / ( 1 + y^2 )^0.5 == a, y] Gives a complex solution : (0.+ i )a / (a^2 - x^2)^0.5 Which is correct but could be simpler, not complex The solution I expected is: a/(x^2 - a^2)^0.5 How can I instruct Mathematica (Solve) to give the simple solution directly. kind regards Dick Barends

**Follow-Ups**:**Re: Q: Solve gives complex solution where there is a noncomplex solution how to get the last one?***From:*Murray Eisenberg <murray@math.umass.edu>

**Re: Q: Solve gives complex solution where there is a noncomplex solution how to get the last one?***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>

**Re: Q: Solve gives complex solution where there is a noncomplex solution how to get the last one?***From:*DrBob <drbob@bigfoot.com>

**Re: Q: Solve gives complex solution where there is a noncomplex solution how to get the last one?***From:*jmt <jmt@dxdydz.net>