Articles I plan to work on eventually. Listing them here is primarily a reminder to me, not to discourage anyone else from working on them before I get around to it. -- Infrogmation
... fraction; the common 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 ...