Réponses

2013-03-17T13:56:26+01:00
Meilleure réponse !
2013-03-17T14:01:12+01:00

A = (3x+3((x-5)

A = 3x²+15x+3x-15

A = 3x² +18x -15

 

b = (-6t-2t)(t-7)

B = -6t²+42t-2t+42t

b = -6t²+82t

 

C = -3y²-15y+6y-30

c = -3y²19y-30

 

D = 2x²-5x(2-x)

= 4x²-2x^3 -10x +5x²

= 2x^3 +9x² -10x