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Worldwatch Institute

The Worldwatch Institute publishes "The State of the World" annually. Its leader is Lester Brown[?].



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Quadratic formula

... non-zero. These solutions 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 ...

 
 
 
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