Réponses

2013-11-03T12:52:38+01:00
1) (x+4) [(-7+2x)+(3x-1)] = (x+4)(5x-8)
2) (2x-7) [(x+3)-(4x+3)] = (2x-7)(-3x)= -3x(2x-7)
Voilàà ♥
2013-11-03T13:03:54+01:00
(x+4)(-7+2x+3x-1)
(x+4)(5x-8)

(2x-7)(x+3+4x+3)
(2x-7)(5x+6)