Réponses

2013-01-28T19:05:02+01:00
2013-01-28T19:08:18+01:00

Bonsoir

c = (4x-3)(4x-3-6x-1)

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

 

d = (4x-1)(4x-1+x+3)

d = (4x-1)(5x+2)

 

C = (2x+1)² -4²    forme de a²-b² =(a-b)(a+b)

C = (2x+1-4)(2x+1+4)   

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