Hy.

I have question how can i make derivate from implicit function i have lost at the begining.

parameters of this function are

$\displaystyle a=7;\ b=5;\ c=3;\ d=-7;\ e=-5;\ f=-2$

this is my implicit function which is making me crazy

$\displaystyle a x^2+b x y+c y^2+d x+e y+f=0$