Réponses

2013-03-16T11:36:31+01:00

 4x + 4
= 4*(x+1)

8x - 8
=8*(x-1)


4 + 2x
=2*2 + 2*x
=2*(2+x)

2x - 8
=2*x - 2*4
=2*(x-4)

9x²-5x
= 9*x*x - 5*x
= x*(9x-5)

6x + 9
=3*2x + 3*3
=3*(2x+3)

Voila !