Réponses

2012-10-04T18:18:24+02:00

  1) 10y²+15y -4y-6 -7y²-8y+4 = 3y² +11y -2 

 

3*(2/3)²+3*(2/3) -2 

2012-10-04T18:50:59+02:00

(10y^2+15y-4y-6)-7y^2-8y+4      3y^2+7y-2

 

 

 

3(4/9)+3(2/3)-2

(4/3)+(6/3)-(6/3)=4/3