Réponses

2012-10-17T13:41:55+02:00

a 2(x+3)

b 4(3-7x)

c1(4x+7)

d chep

e 27x-3)

 voila :

2012-10-17T13:52:31+02:00

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

b=12-28x=4*3-4*7x=4(3-7x)

c=2x²+7x=2x*x+7*x=x(2x+7)

d=3x*x+3x*3=3x(x+3)

e=27x-12x²=3x*9-3x*4x=3x(9-4x)