Umbria is a hilly region in central Italy, spread over the provinces of Perugia and Terni. The region is named for the Umbri[?] tribe, who settled in the region in the 6th century BC. Their language was Umbrian, a relative of Latin.
... terms of the 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 ...