Decades: 1490s BC 1480s BC 1470s BC 1460s BC 1450s BC - 1440s BC - 1430s BC 1420s BC 1410s BC 1400s BC 1390s BC
Significant People
... The formula reads <math> x=\frac{-b \pm \sqrt {b^2-4ac}}{2a} </math> The term b2 – 4ac is called the discriminant of the quadratic ...