Réponses

  • Utilisateur Brainly
2013-10-06T14:38:53+02:00
1) 12x² + 16=4(3x²+4)
2) 9x² - 12x + 4 =(3x-2)²
3) 1 -  =18b²(b-1)(b+1)
4) (6x - 3) ² - 7 (x + 1) (3 - 6x)
=(6x-3)(6x-3+7x+7)=(6x-3)(13x+4)