Nansen passports are internationally recognized identity cards first issued by the League of Nations to stateless refugees. Invented in 1922 by Fridtjof Nansen, it was eventually honored by governments in 52 countries.
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... the equation. The formula reads
<math>
x=\frac{-b \pm \sqrt {b^2-4ac}}{2a}
</math>
The term b2 – 4ac is called the discriminant of the quadratic ...