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John Herschel

John Frederick William Herschel (March 7, 1792 - May 11, 1871) English mathematician and astronomer.

Son of astronomer William Herschel.

John Herschel orginated the use of the Julian date system in astronomy.

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Quadratic formula

... fraction; the common denominator 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 ...

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