AUC - 1. Latin "AB URBE CONDITA" (from the founding of the city (of Rome) or "ANNO URBIS CONDITAE" (in the year from the founding of the city (of Rome) 2. "area under the curve" in the concentration time curve (medicine)
CEPT - Conference Européenne des administration des Postes et des Télécommunications (European Conference of Postal and Telecommunications Administrations)
... formula is not ideal. See Loss of significance for details.
Derivation
The quadratic formula is derived by the method of completing the square[?]. ...