2 variables symbolic function representation

Hello everyone!

I need to represent a two variables function.

From the following determinant

A =

I obtained the quadratic equation:

a =

These are the vectors p and q:

p00 = 0.909722222222223

p10 = -0.233216488601376

p01= 0.264523899711384

p20=-1.06968750000000

p11=-0.0207056503962889

p02=0.578645833333333

q00=0.907638888888890

q10=0.00799330706899891

q01=0.0257069830283098

q20=0.0382031250000013

q11=0.0414113007925775

q02=-0.628619791666669

I want to impose the function a ==0 and in order to obtain the curve and then I would like to represent it in a graph.

Is there a way to do it?

I used ht = matlabFunction(a) to obtain

ht = function_handle with value:

@(p01,p02,p10,p11,p20,q01,q10,q11,q20,x,y)(p20.*q11.*2.0-p11.*q20.*2.0).*x.^2+(p20.*q20.*4.0-p02.*q20.*4.0).*x.*y+(p10.*q11-p01.*q20.*2.0-p11.*q10+p20.*q01.*2.0).*x+(p11.*q20.*2.0-p02.*q11.*2.0).*y.^2+(p11.*q01-p02.*q10.*2.0-p01.*q11+p10.*q20.*2.0).*y+(p10.*q01-p01.*q10)

I don't understand if it is useful.

Thank you very much!

Laura