The Bureau of Labor Statistics (BLS) is the unit of the United States Department of Labor which is the principal fact-finding agency for the U.S. government in the field of labor economics and statistics.
Indices and statistics produced by the BLS include:
... generalizations) with a being non-zero. These solutions are also called the roots of the equation. The formula reads
<math>
x=\frac{-b \pm \sqr ...