Re: Re: Simplfying inside Sqrt
- To: mathgroup at smc.vnet.net
- Subject: [mg55138] Re: [mg55122] Re: Simplfying inside Sqrt
- From: DrBob <drbob at bigfoot.com>
- Date: Mon, 14 Mar 2005 03:43:37 -0500 (EST)
- References: <d0u7bj$kph$1@smc.vnet.net> <200503130957.EAA09949@smc.vnet.net>
- Reply-to: drbob at bigfoot.com
- Sender: owner-wri-mathgroup at wolfram.com
PowerExpand[Factor /@ Sqrt[x^2 + x^4]] x*Sqrt[1 + x^2] Bobby On Sun, 13 Mar 2005 04:57:40 -0500 (EST), Peter Pein <petsie at arcor.de> wrote: > billkavanagh at gmail.com wrote: > >> Hi >> >> I'm wondering how to tell mathematica that I want terms like >> Sqrt[x^2+x^4] to be x*Sqrt[1+x^2]. I have an expression with a few >> terms like this in it so manually inserting a >> PowerExpand[Sqrt[Expand[x^2+x^4]] is no good to me. >> >> I've tried a general PowerExpand and Simplify with a Im[x]==0 around >> the whole expression but with no luck. >> >> Does anybody know how to do this? >> >> Thanks, >> Bill >> >> -- >> William R. Kavanagh >> http://www.physics.mun.ca/~wkavanag >> > There /has/ to be something more simple than > > Simplify[#1, x >= 0] & /@ > (Sqrt[x^2 + x^4] /. (a_)^(b_) :> (#1^b & ) /@ Factor[a]) > > but I don't see it at the moment. > -- DrBob at bigfoot.com
- References:
- Re: Simplfying inside Sqrt
- From: Peter Pein <petsie@arcor.de>
- Re: Simplfying inside Sqrt