As for the 4 quadratics, I told you that I used Newton Interpolation to compute the coefficients of the polynomials.

My mistake but if you have already solved the problem what do you want me to do?

There are no lines that intercept only in our imagination.

I do not agree, on the other forum they urged you to try to formulate this geometrically, you now say that it is imaginary. If we can not check graphically or algebraically how will you ever know you are right?

I have devoted alot of time to a problem without a solution, coffeemath might be able to assist you better over at the SE. I have done everything I can, good luck.