Re: Grouping terms under the radical
- To: mathgroup at smc.vnet.net
- Subject: [mg120079] Re: Grouping terms under the radical
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Fri, 8 Jul 2011 04:49:56 -0400 (EDT)
- Reply-to: hanlonr at cox.net
expr = Sqrt[2*n] Sqrt[2]*Sqrt[n] expr /. Sqrt[x_] Sqrt[y_] -> HoldForm[Sqrt[x*y]] HoldForm[Sqrt[2*n]] % // ReleaseHold Sqrt[2]*Sqrt[n] Bob Hanlon ---- paulvonhippel at yahoo <paulvonhippel at yahoo.com> wrote: ============= This must be a classic question. When I input Sqrt[(2 n)] Mathematica displays the output as Sqrt[2] Sqrt[n] -- i.e., both 2 and n are under their own radical. The display of output doesn't change if I impose the assumption that n > 0. This is fine from a mathematical point of view, but it looks unconventional when pasted into a paper. It seems to me most authors would keep the 2 and the n under a common radical -- how can I get Mathematica to do the same? Thanks!