rationalize numerator of quotient

*To*: mathgroup at smc.vnet.net*Subject*: [mg81125] rationalize numerator of quotient*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Thu, 13 Sep 2007 06:27:39 -0400 (EDT)*Organization*: Mathematics & Statistics, Univ. of Mass./Amherst*Reply-to*: murray at math.umass.edu

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

**Follow-Ups**:**RE: rationalize numerator of quotient***From:*"Jaccard Florian" <Florian.Jaccard@he-arc.ch>