Decades: 1470s BC 1460s BC 1450s BC 1440s BC 1430s BC - 1420s BC - 1410s BC 1400s BC 1390s BC 1380s BC 1370s BC
Significant People
... qualitatively different cases: If the discriminant is zero, then there is a repeated solution x, and this solution is real. (Geometrically, this means that the parabola ...