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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
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