Decades: 1340s BC 1330s BC 1320s BC 1310s BC 1300s BC - 1290s BC - 1280s BC 1270s BC 1260s BC 1250s BC 1240s BC
Significant People
... it is the square of (x + b/(2a)). The right side can be written as a single fraction; the common denominator is 4a2. W ...