May 9 - Muhammed Ali was stripped of his World Heavyweight Champion titles and was banned from boxing by the various commissions for his refusal to be inducted into the United States Army
... are also called the roots of the equation. The formula reads
<math>
x=\frac{-b \pm \sqrt {b^2-4ac}}{2a}
</math>
The term b2 – 4ac is called the ...