Réponses

2013-05-27T17:50:44+02:00

Bonsoir

 

a = 6(x+2) + (3-x) + 2x+8

a = 6x+12 +3-x+2x+8

a = 7x +23

 

b = (x+2)(2x+3)+3x²

b = 2x² +3x +4x +6 +3x²

b = 5x² +7x +6