Why won't MMA simplify parts of expressions?

• To: mathgroup at yoda.physics.unc.edu
• Subject: Why won't MMA simplify parts of expressions?
• From: alex at fff.chem.utah.edu (Alex Dommasch)
• Date: Thu, 26 Mar 92 11:32:49 MST

```I have a simple problem.  Look at the following Mathematica output:

In[1] :=
Simplify[a b + a c]

Out[1] =
a (b + c)

In[2] :=
Simplify[a b + a c + d]

Out[2] =
a b + a c + d

Why won't MMA simplify the (a c + a d) part of the expression?  Is
there a way to make it do that?  Or is it just an inherent limitation
in the Factor[] routine?  (I'm using MMA version 2.0.)

Thanks for any help.
--
Alex Dommasch, Programmer                               |--

Field-Flow Fractionation Research Center                |-

Department of Chemistry, University of Utah             V

Salt Lake City, Utah 84112                              |->|..
(801)581-7168		FAX: (801)581-4353              |- |.

alex at fff.chem.utah.edu (NeXT Mail)                      |  |

```

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