Réponses

  • Utilisateur Brainly
2014-09-10T19:06:41+02:00
(3x + 2)(5x - 3) - (2x + 3)(5 - 7x)
= 15x² - 9x + 10x - 6 - (10x - 14x² + 15 - 21x)
= 15x² + x - 6 - 10x + 14x² - 15 + 21x
= 29x² + 12x - 21