Réponses

2013-04-21T12:27:33+02:00

1: 3(15a-4)

    45a-12

2:2(x-3y)

   2x-6y

3:25a(4a+3+2b)

   100a²+75a+50ab

4:4x(2x+5)

   8x²+20x

5:2/3(3a+5)

  2a+3.33

6:3/5(10-15b)

   6-9b

 

voila !

2013-04-21T12:28:26+02:00