Intersection points Tangent line in a point of a non-degenerated conic section.
The roots are h1 and h2. With these h-values correspond two intersection points with the conic section. These points can be coinciding or imaginary or ideal. Previous theorem holds even if the line d is imaginary. If a line and a conic section have more than two common points, the conic section is degenerated and the line is a component.