MathGroup Archive 1998

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Problem to be solved

  • To: mathgroup at
  • Subject: [mg14097] Problem to be solved
  • From: "Andre' David" <l42549 at>
  • Date: Fri, 25 Sep 1998 03:15:22 -0400
  • Organization: Instituto Superior Tecnico
  • Sender: owner-wri-mathgroup at


	I have been in battle for the last few days in trying to make
Mathematica (3.0) do the following:

	Imagine I have something like ax^2+bx+c. Now I want to know how to make
Mathematica return me something in the form (x+d)^2, where d depends on
a, b and c.

	This is the simple form. In reality I am trying to determine the sigma
and mu of a product of the form

	f_i=1/(sqrt(2 pi) sigma_i) Exp( -(x-mu_i)^2/(2 sigma_i^2)  )

	So I want to know what is the sigma and mu of f_1 times f_2.

	Now that you know it, I can also add that I tried Collect in every way,
and some substituion rules.

	All help thanked

		Andre David Tinoco Mendes

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