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173

Centuries: 1st century - 2nd century - 3rd century

Decades: 120s 130s 140s 150s 160s - 170s - 180s 190s 200s 210s 220s

Years: 168 169 170 171 172 - 173 - 174 175 176 177 178

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Quadratic formula

... x + \frac{c}{a}=0 </math> which is equivalent to <math>x^2+\frac{b}{a}x=-\frac{c}{a}.</math> The equation is now in a form in which we ca ...

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