Centuries: 12th century - 13th century - 14th century
Decades: 1240s 1250s 1260s 1270s 1280s - 1290s - 1300s 1310s 1320s 1330s 1340s
Years: 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299
... 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 ...