Re: rationalize numerator of quotient
- To: mathgroup at smc.vnet.net
- Subject: [mg81164] Re: rationalize numerator of quotient
- From: dimitris <dimmechan at yahoo.com>
- Date: Fri, 14 Sep 2007 03:40:07 -0400 (EDT)
- References: <fcb3ok$fjj$1@smc.vnet.net>
On 13 , 13:35, Murray Eisenberg <mur... at math.umass.edu> wrote: > I have a quotient such as: > > (Sqrt[x] - 2)/(x-4) > > I want to "rationalize the numerator" by multiplying numerator and > denominator each by Sqrt[x] + 2 so as to obtain result: > > 1/(Sqrt[x]+2) > > How? > > -- > Murray Eisenberg mur... at math.umass.edu > Mathematics & Statistics Dept. > Lederle Graduate Research Tower phone 413 549-1020 (H) > University of Massachusetts 413 545-2859 (W) > 710 North Pleasant Street fax 413 545-1801 > Amherst, MA 01003-9305 In[24]:= Simplify[(Sqrt[x] - 2)/(x - 4)] Out[24]= 1/(2 + Sqrt[x]) In[25]:= Factor[(Sqrt[x] - 2)/(x - 4)] Out[25]= 1/(2 + Sqrt[x]) ???