move the content of automobile to a page about its construction, and have a more general article on the automobile page, which includes summaries about the automobile's history and social impact.
the same thing with the Roman Empire page. The page should be about the roman empire, not its emperors.
... the formula should be understood as "either of those element(s) of the field whose square equals b2 - 4ac". In some fields, some elements have no ...