See also: List of years in literature
(Please add to this list. If you have read any of the books above, why not write an article for Wikipedia?)
... denominator is 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 both ...