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COS

COS - Refer to http://www.reade.com/Products/Sulfides/cobalt_sulfides

Cobalt Sulfide.

    Entry filled by year 12 student.

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Quadratic formula

... so we add the square of b/(2a) to both sides, getting <math>x^2+\frac{b}{a}x+\frac{b^2}{4a^2}=-\frac{c}{a}+\frac{b^2}{4a^2}.</math> The left side is now ...