Réponses

2012-10-22T22:13:42+02:00

A=13x ; B=12x ; C=6x X x + 6x X 3 +4x +2 =6 x au carré +21 x + 2

 voila :)

2012-10-22T22:22:09+02:00

A=4x+7x+2x=(4+7+2)x=13x

B=8x+x+3x=8x+1x+3x=(8+1+3)x=12x

c=6*(x+3)+4x+2=6*x+6*3+4x+2=6x+18+4x+2=6x+4x+18+2=(6+4)x+20=10x+20