Réponses

2013-03-12T14:53:30+01:00

Alors, 

= x²+8x+16-(x²+8x+2x+16)

=x²+8x+16-x²-10x-16

=2x

 

2013-03-12T14:53:45+01:00

     X² + 8x + 16 - (x² + 10x + 16)

=  x² + 8x + 16 -x² -10x -16

= -2x