## Encyclopedia > 230 BC

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# 230 BC

Centuries: 4th century BC - 3rd century BC - 2nd century BC

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 Quadratic formula ... + \left( \frac{b}{a} \right) x + \frac{c}{a}=0 [/itex] which is equivalent to $x^2+\frac{b}{a}x=-\frac{c}{a}.$ The equation is now in ...