Respuestas

  • Usuario de Brainly
2014-03-11T02:39:23+01:00
(2a -b)³ - 27  factorizamos a³ -b³ = (a -b) (a²+ab +b²)

(2a -b )³ -3³  =(2a-b -3) ((2a-b)² +(2a -b)3 +3²))
(2a -b -3)((4a² - 2ab +b²) +6a-3b +9)
(2a - b -3) (4a² -2ab +b² +6a -3b +9)