A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- U -- V -- W -- X -- Y -- ZUniversities beginning with U, excluding the words University, Universidad, Université, etc.
... equation, because it discriminates between three qualitatively different cases:
If the discriminant is zero, then there is a repeated solution x, and th ...