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Re: Why isn't Expand grouping terms by order?
You are looking for the command Collect Collect[(1 + a*x)*(1 + b*x), x] a*b*x^2 + (a + b)*x + 1 Bob Hanlon ---- p at dirac.org wrote: > Consider this: > > In:= Expand[ (1+a*x)*(1+b*x), x] > > 2 > Out= 1 + a x + b x + a b x > > > How can I coax Mathematica to give me this, instead: > > 2 > Want= 1 + (a + b) x + a b x > > Why isn't Mathematica reporting the answer in terms of powers of x? > > Thanks! >