The Great Sphinx of Giza is a large sculpture on the west bank of the Nile River. The Great Sphinx is not a true sphinx; it is the head of King Chephren with a crouching body. It was built in the Fourth Dynasty (2723 BCE-2563 BCE)
... which are real. (Geometrically, this means that the parabola intersects the x-axis in two points.)
If the discriminant is negative, then there are two different solutions ...