Réponses

2013-11-15T20:41:49+01:00
Bonsoir

A()= 4(-1)-9
A = 4(x² -2x +1) -9
A = 4x² -8x +4 -9
A = 4x² -8x -5

B()= (2-5)(2+1)
B = 4x² +2x -10x -5
B = 4x² -8x -5