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Hans Christian Oersted Institute

The Hans Christian Ørsted Institute of the University of Copenhagen is named after the physicist Ørsted (1777-1851), the discoverer of electromagnetism (1820).

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... is 4a2. We get <math>\left(x+\frac{b}{2a}\right)^2=\frac{-4ac+b^2}{4a^2}=\frac{b^2-4ac}{4a^2}.</math> Taking square roots of both ...