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Underground ezine

Publication without defined periodicity that talks about any subject that is able to estimulate or to make a mind worry.

It is distributed usually free and it's made freely by the ezine organizers. Some articles are contributed by other persons.

Some examples are:



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
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Quadratic formula

... real. (Geometrically, this means that the parabola intersects the x-axis in two points.) If the discriminant is negative, then there are two different solutions x, both ...

 
 
 
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