Redirected from 631 BC
Decades: 680s BC 670s BC 660s BC 650s BC 640s BC - 630s BC - 620s BC 610s BC 600s BC 590s BC 580s BC
Significant People
... square trinomial of the form x2 + 2xy + y2. Since "2xy" in this case is (b/a)x, we must have y = b/(2a), so we add the square of b/(2a) to both sides, ...