Centuries: 9th century - 10th century - 11th century
Decades: 870s 880s 890s 900s 910s - 920s - 930s 940s 950s 960s 970s
Years: 921 922 923 924 925 - 926 - 927 928 929 930 931
Births
Deaths
... equation is now in a form in which we can conveniently complete the square[?]. To "complete the square" is to add a constant (i.e., ...