The United States order of precedence is a nominal and symbolic hierarchy of important positions within the government of the United States. The order is established by the President of the United States and can be changed at his direction. It has no legal standing and is instead used to dictate ceremonial protocol.
... coefficients a, b and c, which are assumed to be real (but see below for generalizations) with a being non-zero. These solutions are also called the roots of th ...