Centuries: 2nd century - 3rd century - 4th century
Decades: 240s 250s 260s 270s 280s - 290s - 300s 310s 320s 330s 340s
Years: 287 288 289 290 291 - 292 - 293 294 295 296 297
Births
Deaths
... our quadratic equation by a, we have <math> x^2 + \left( \frac{b}{a} \right) x + \frac{c}{a}=0 </math> which is equivalen ...