Zimbabweanmusic includes folk and pop styles. Much of it is based on the mbira[?], a traditional instrument from the Zezuru[?]Shona[?]. It has 22-28 metal keys on a soundboard, usually placed in a large gourd resonator.
... as "either of those element(s) of the field whose square equals b2 - 4ac". In some fields, some elements have no square roots and some have two; only zero has just ...