Réponses

2013-03-03T14:07:58+01:00

B = 25x^7-36x^5 = x^5((5x)² - 6²) = x^5(5x-6)(5x+6)

 

C = (x-3)²-25 (x+2)² = -(4x+13)(6x+7)

 

D = 144(x-1)²-16(x+2)² = 16(2x-5)(4x-1)

 

En espérant t'avoir aidé.