Réponses

2014-03-23T10:11:10+01:00
A = (2x-3)(7x+1) 

B = (2x-3)(5x+4)+(2x-3)(2x-3)

B = (2x-3) (5x+4+2x-3)  = (2x-3) (7x+1)

Donc A=B