Réponses

  • Utilisateur Brainly
2014-09-26T14:55:23+02:00
(3t + 2)² - (t - 3)²
= 9t² + 12t + 4 - (t² - 6t + 9)
= 9t² + 12t + 4 - t² + 6t - 9
= 8t² + 18t - 5