Decades: 1340s 1350s 1360s 1370s 1380s - 1390s - 1400s 1410s 1420s 1430s 1440s
Years: 1389 1390 1391 1392 1393 - 1394 - 1395 1396 1397 1398 1399
Births
Deaths
... equation is now in a form in which we can conveniently complete the square[?]. To "complete the square" is to add a constant (i.e., in this case, a quantity that does not ...