Centuries: 9th century - 10th century - 11th century
Decades: 880s 890s 900s 910s 920s - 930s - 940s 950s 960s 970s 980s
Years: 929 930 931 932 933 - 934 - 935 936 937 938 939
Births
Deaths
... 4a2. We get <math>\left(x+\frac{b}{2a}\right)^2=\frac{-4ac+b^2}{4a^2}=\frac{b^2-4ac}{4a^2}.</math> Taking square roots of bo ...