Réponses

  • Utilisateur Brainly
2013-10-25T16:43:24+02:00
(3x+2)² - 4(3-x)²
=9x²+12x+4-4(x²-6x+9)
=5x²+36x-32
2013-10-25T16:52:52+02:00
(3x+2)²-4(3-x)²
9x²+12x+4-4(9-6x+x²)
9x²+12x+4-36+24x-4x²
5x²+36x-32