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Re: A New User

  • To: mathgroup at
  • Subject: [mg29339] Re: A New User
  • From: "Orestis Vantzos" <atelesforos at>
  • Date: Thu, 14 Jun 2001 02:27:18 -0400 (EDT)
  • Organization: National Technical University of Athens, Greece
  • References: <9g74cq$cg1$>
  • Sender: owner-wri-mathgroup at

Coefficient[(a+b Sqrt[c])(d+e Sqrt[c])^k,Sqrt[c]] will return g

I suppose that Simplify should return the simple expression if applied on
the product.


"Jim-dars" <jim-dars at> wrote in message
news:9g74cq$cg1$1 at

> Hi All,
> I have a problem of the form:
>       (2+Sqrt(3))*(1+2*Sqrt(3))
> I would like Mathematica to present the solution in the form (8 +
> 5*Sqrt(3)).
> Of course, I realize I can calculate the two components.  However, since
> this situation occurs repeatedly in a problem I'm solving, it would be
> convenient to have Mathematica display the answer directly.  In fact, if
> Mathematica could provide me with a=8 and b=5 that would be even better.
> My actual problem is of the form:
>          (a+b*Sqrt(c))*(d+e*Sqrt(c))^k  = (f+g*Sqrt(c))
> where a,b,c,d, and e are positive integers.  c is not a perfect square,
> may contain a square factor.
> k is an integer such that -infinity < k < infinity.   It is desired to
> f and g.  (Actually, just g.)
> Best wishes, Jim

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