Jin Ke (荊軻 pinyin jin1 ke1) was a guest residing in the estates of Dan, crown prince of Yan[?] and renowned for his failed assassination of the Chinese emperor Qin Shi Huang Di.
... \sqrt {b^2-4ac}</math>
in the formula should be understood as "either of those element(s) of the field whose square equals b2 - 4ac". In some fields, som ...