# [LON-CAPA-users] formula response or maxima response example requested

**Roy Vson
**
lon-capa-users@mail.lon-capa.org

*Mon, 10 Dec 2007 14:33:03 -0500*

Hello: just saw this post. You could sneak up on the problem : [1]
what is the coefficient of x**3? [2] ...
On Nov 29, 2007 12:45 PM, Jay Sullivan <jmsloncapa@gmail.com> wrote:
>* Hi Folks,
*>*
*>* I'm looking for an example of a specific type of formula response (or maxima
*>* graded response).
*>*
*>* What I would like a student to do is to enter a polynomial function.
*>* However, I want to be sure that they have entered it in expanded form ( i.e.
*>* _not_ as a product of factors). I know that formula response will accept
*>* either as correct since the test function matches the input function in
*>* either case.
*>*
*>* Here is a specific example, to clarify:
*>*
*>* Find a polynomial of least degree having only real coefficients, with zeros
*>* -3,-2,-1,1,2,3 and with f(0) = -36.
*>*
*>* Using a loncapa formula response either of the answers below are graded as
*>* correct:
*>*
*>* (x+3)(x+2)(x-1)(x-2)(x-3) OR x^6 -14*x^4 +49*x^2 -36
*>*
*>* I would like to be able to require that students explicitly enter the second
*>* version. I'm guessing there is a way to
*>* do this with maxima? I'd rather not use a string response.
*>*
*>* Thanks for any tips or related examples......
*>* Jay
*>*
*>*
*