Decades: 1350s BC 1340s BC 1330s BC 1320s BC 1310s BC - 1300s BC - 1290s BC 1280s BC 1270s BC 1260s BC 1250s BC
Significant People
... that the parabola intersects the x-axis in two points.) If the discriminant is negative, then there are two different solutions x, both of which are complex numbers. ...