Decades: 1270s BC 1260s BC 1250s BC 1240s BC 1230s BC - 1220s BC - 1210s BC 1200s BC 1190s BC 1180s BC 1170s BC
Significant People
... b2 – 4ac is called the discriminant of the quadratic equation, because it discriminates between three qualitatively different cases: If the discriminant is zero, ...