Redirected from 660 BC
Decades: 710s BC 700s BC 690s BC 680s BC 670s BC - 660s BC - 650s BC 640s BC 630s BC 620s BC 610s BC
Significant People
... for details. Derivation The quadratic formula is derived by the method of completing the square[?]. <math>ax^2+bx+c=0</math> Dividing our ...