Réponses

2013-12-16T18:53:43+01:00
Bonsoir

( 3a-5) (a+4) + (5a-7) (3a-5) 
(3a-5)(a+4 + 5a -7)
(3a+5)(6a -3)


(8x-9) (2x-3) - (2x-3) (3x+2) 
(2x-3)(8x-9 - 3x -2)
(2x-3) ( 5x -11)

(4y-3) + (4y-3) (y+1) 
(4y -3)(y+1)


   (5t-4) (3t+8) -3t-8
parenthèses ou signes ?