Réponses

2014-01-21T16:23:44+01:00
Bonjour

A= (12x + 7)² - (11 - 5x)(12x + 7)
A = (12x +7)(12x+7) - (11 -5x)
A = (12x+7)(12 x+7 -11 +5x)
A = (12x+7)(17x -4)

B= x² - 8x + 16
B = (x -4)²

C= 36x² + 96x + 64
C = (6x +8)²

D= (5x - 3)² - 144
D = (5x - 3 -12)(5x -3 +12)
D = (5x -15)(5x +9)

E= (9x + 7)² - (4x - 15)²

E = (9x +7 +4x -15)(9x +7 -4x +15)
E = (13x - 8)(5x + 22)