Réponses

  • Utilisateur Brainly
2012-11-03T17:13:44+01:00

(2x-3)[(2x-3)+(3x+4)]

(2x-3)(2x-3+3x+4)

(2x-3)(5x+1)

2012-11-03T17:28:18+01:00

(2x-3)²+(2x-3)(3x+4)

=(2x-3)(2x-3)+(2x-3)(3x+4) : on factorise par 2x-3

=(2x-3)[(2x-3)+(3x+4)]

=(2x-3)(2x-3+3x+4)

=(2x-3)(5x+1)