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)
... below for generalizations) with a being non-zero. These solutions are also called the roots of the equation. The formula reads
<math>
x=\frac{-b \pm \sqrt ...