Re: rationalize numerator of quotient

*To*: mathgroup at smc.vnet.net*Subject*: [mg81165] Re: [mg81125] rationalize numerator of quotient*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Fri, 14 Sep 2007 03:40:38 -0400 (EDT)*Reply-to*: hanlonr at cox.net

y = (Sqrt[x] - 2)/(x - 4); y // Simplify 1/(Sqrt[x] + 2) y // Cancel 1/(Sqrt[x] + 2) y // Apart 1/(Sqrt[x] + 2) Bob Hanlon ---- Murray Eisenberg <murray 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 murray 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 >