Decades: 1330s 1340s 1350s 1360s 1370s - 1380s - 1390s 1400s 1410s 1420s 1430s
Years: 1380 1381 1382 1383 1384 - 1385 - 1386 1387 1388 1389 1390
Births
Deaths
... to be real (but see below for generalizations) with a being non-zero. These solutions are also called the roots of the equation. The formu ...