Centuries: 7th century - 8th century - 9th century
Decades: 670s 680s 690s 700s 710s - 720s - 730s 740s 750s 760s 770s
Years: 724 725 726 727 728 - 729 - 730 731 732 733 734
Births
Deaths
... 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, ...