Réponses

  • Utilisateur Brainly
2014-10-27T11:02:57+01:00
(2x + 3)² - (2x + 3)(x + 3)
= (2x + 3)(2x + 3 - x - 3)
= x(2x + 3)

(3x - 1)² - 16
= (3x - 1)² - 4²
= (3x - 1 - 4)(3x - 1 + 4)
= (3x - 5)(3x + 3)
= 3(3x - 5)(x + 1)