Decades: 1330s 1340s 1350s 1360s 1370s - 1380s - 1390s 1400s 1410s 1420s 1430s
Years: 1382 1383 1384 1385 1386 - 1387 - 1388 1389 1390 1391 1392
Births
Deaths
... then there are two different solutions x, both of which are real. (Geometrically, this means that the parabola intersects the x-axis in two points.) If the discriminant is ...