Centuries: 3rd century - 4th century - 5th century
Decades: 290s 300s 310s 320s 330s - 340s - 350s 360s 370s 380s 390s
Years: 338 339 340 341 342 - 343 - 344 345 346 347 348
Births
Deaths
... b/(2a) from both sides, we get <math>x=\frac{-b}{2a}\pm\frac{\sqrt{b^2-4ac}}{2a}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.</math> Generalizations ...