Re: solve for a squared variable
- To: mathgroup at smc.vnet.net
- Subject: [mg60459] Re: [mg60424] solve for a squared variable
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Fri, 16 Sep 2005 05:36:37 -0400 (EDT)
- Reply-to: hanlonr at cox.net
- Sender: owner-wri-mathgroup at wolfram.com
As the error message states, x^2 is not a variable (Symbol)
x^2/.Solve[x^2+y==1,x] // Union
{1-y}
z /. Solve[x^2+y==1/.x^2->z,z]
{1-y}
Bob Hanlon
>
> From: "Ruth Lazkoz" <ruth.lazkoz at ehu.es>
To: mathgroup at smc.vnet.net
> Date: 2005/09/16 Fri AM 03:49:04 EDT
> Subject: [mg60459] [mg60424] solve for a squared variable
>
> Hi everyone,
>
> Why does
>
> Solve[x^2 + y == 1, x^2]
>
> give and error message? How can I solve for x^2?
>
> Thanks,
>
> Ruth
>
>
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