Re: question about HoldForm
- To: mathgroup at smc.vnet.net
- Subject: [mg60786] Re: [mg60777] question about HoldForm
- From: Andrzej Kozlowski <andrzej at yhc.att.ne.jp>
- Date: Thu, 29 Sep 2005 05:40:54 -0400 (EDT)
- References: <200509280541.BAA08384@smc.vnet.net>
- Reply-to: Andrzej Kozlowski <andrzej at akikoz.net>
- Sender: owner-wri-mathgroup at wolfram.com
On 28 Sep 2005, at 14:41, Ruth Lazkoz wrote:
>
> Hi,
>
> I have this expression
>
> x = 2; HoldForm[x^2 + 4x + 4]
>
> Is there a way to operate on HoldForm so that I get (x^2+2)^2? If I
> cut
> a paste the result and operate on it I obviously get 16.
>
> Thanks,
>
> Ruth
>
>
>
Do you mean (x+2)^2?
Assuming so one possible way is something like this:
x = 2; v = HoldForm[x^2 + 4*x + 4];
Block[{x}, HoldForm[Evaluate[v /. HoldForm[u_] :> Factor[u]]]]
HoldForm[(x + 2)^2]
Andrzej Kozlowski
- References:
- question about HoldForm
- From: "Ruth Lazkoz" <ruth.lazkoz@ehu.es>
- question about HoldForm