Why isn't Expand[] grouping terms by order?
- To: mathgroup at smc.vnet.net
- Subject: [mg87825] Why isn't Expand[] grouping terms by order?
- From: <p at dirac.org>
- Date: Fri, 18 Apr 2008 02:38:56 -0400 (EDT)
Consider this:
In[19]:= Expand[ (1+a*x)*(1+b*x), x]
2
Out[19]= 1 + a x + b x + a b x
How can I coax Mathematica to give me this, instead:
2
Want[19]= 1 + (a + b) x + a b x
Why isn't Mathematica reporting the answer in terms of powers of x?
Thanks!