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From: mas on 16 May 2010 20:44
Hi,

I would like to solve quadratic equations that are in the form
Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0

If I use solve command how to pass the parameters of this equation (A, B, C, D, E, F) to the command. So I mean that there is a for loop and these parameters change in each iteration....

Thanks in advance
From: Greg Heath on 16 May 2010 20:59
On May 16, 8:44 pm, "mas " <m...(a)egypt.ca> wrote:
> Hi,
>
> I would like to solve quadratic equations that are in the form
> Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0
>
> If I use solve command how to pass the parameters of this equation (A, B, C, D, E, F) to the command. So I mean that there is a for loop and these parameters change in each iteration....
>

Why use solve when you can write the equations for the solution??

Hope this helps.

Greg
From: mas on 17 May 2010 00:22
Greg Heath <heath(a)alumni.brown.edu> wrote in message <9339e918-764a-436f-88cb-785c0af96304(a)j27g2000vbp.googlegroups.com>...
> On May 16, 8:44 pm, "mas " <m...(a)egypt.ca> wrote:
> > Hi,
> >
> > I would like to solve quadratic equations that are in the form
> > Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0
> >
> > If I use solve command how to pass the parameters of this equation (A, B, C, D, E, F) to the command. So I mean that there is a for loop and these parameters change in each iteration....
> >
>
> Why use solve when you can write the equations for the solution??
>
> Hope this helps.
>
> Greg

Thank you for your reply ... Do you mean to try to solve the 2 quadratic equations analytically so I can get expression of the intersection points.
From: aasim Azooz on 17 May 2010 01:58
"mas " <mas(a)egypt.ca> wrote in message <hsq3gk$koi$1(a)fred.mathworks.com>...
> Hi,
>
> I would like to solve quadratic equations that are in the form
> Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0
>
> If I use solve command how to pass the parameters of this equation (A, B, C, D, E, F) to the command. So I mean that there is a for loop and these parameters change in each iteration....
>
> Thanks in advance

>>syms x y A B C D E F
>> solve('A*x^2 + B*x*y + C*y^2 + D*x + E*y + F = 0')
ans =

[ 1/2/A*(-D-B*y+(D^2+2*D*B*y+B^2*y^2-4*A*E*y-4*A*F-4*A*C*y^2)^(1/2))]
[ 1/2/A*(-D-B*y-(D^2+2*D*B*y+B^2*y^2-4*A*E*y-4*A*F-4*A*C*y^2)^(1/2))]


Aasim Azooz
From: Greg Heath on 17 May 2010 11:55
On May 17, 12:22 am, "mas " <m...(a)egypt.ca> wrote:
> Greg Heath <he...(a)alumni.brown.edu> wrote in message <9339e918-764a-436f-88cb-785c0af96...(a)j27g2000vbp.googlegroups.com>...
> > On May 16, 8:44 pm, "mas " <m...(a)egypt.ca> wrote:
> > > Hi,
>
> > > I would like to solve quadratic equations that are in the form
> > > Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0
>
> > > If I use solve command how to pass the parameters of this equation (A, B, C, D, E, F) to the command. So I mean that there is a for loop and these parameters change in each iteration....
>
> > Why use solve when you can write the equations for the solution??
>
> > Hope this helps.
>
> > Greg
>
> Thank you for your reply ... Do you mean to try to solve the 2 quadratic equations  analytically so I can get expression of the intersection points.

SORRY! PLEASE IGNORE.
I misread the question.

gREG
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