1977 - Appoximetely a dozen armed HanafiMuslims take over three buildings in Washington, DC, killing one person and taking more than 130 hostages. The hostage situation ends two days later.
... from both sides, we get
<math>x=\frac{-b}{2a}\pm\frac{\sqrt{b^2-4ac}}{2a}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.</math>
Generalizations
The formula and ...