Réponses

2014-05-10T16:10:38+02:00
(4x+1)²+(3x+8)(4x+1)
16x² +8x +1 +12x² +3x +32x +8
28x² +43x +9
2014-05-10T16:26:56+02:00
Salut :) 

=(4x+1)²+(3x+8)(4x+1)
=16x² +8x +1 +12x² +3x +32x +8
=16x² +12x² +8x +3x +32x +8 +1
=28x² +43x +9

Bye