Réponses

2014-05-02T22:06:35+02:00
E = (x-3)² - (x-3)(1-2x)
E  = x² - 6x + 9 - (x - 2x² - 3 - 6x)
E = x² - 6x + 9 - x + 2x² + 3 - 6x

E = 3x² - 13x + 12
  • Omnes
  • Modérateur confirmé
2014-05-02T22:06:37+02:00
Salut,

E = (x-3)² - (x-3)(1-2x)
E = x² - 6x + 9 - (x - 2x² - 3 + 6x)
E = x² - 6x + 9 - (7x - 2x² - 3)
E = x² - 6x + 9 - 7x + 2x² + 3
E = 3x² - 13x + 12

Bonne soirée !