Réponses

2013-04-25T20:42:56+02:00

A= 3(x-2)+5(3-x)

A= 3x-6+15-5x

A= -2x+9

 

B= x(3+x)-2(x+5)

B= 3x+x²-2x-10

B= x²+x-10

 

C= -2(x-7)-2(x²+x)+4(x²+1)

C= -2x+14-2x²-2x+4x²+4

C= 2x²-4x+18

 

D= 2x(-x+5)-x²(1-x)

D= -2x²+10x-x+x^3

D= x^3-2x²+9x

 

E= -6x(2x²-3x)-3(x+4x²)-x(-3+4x)

E= -12^3+18x²-3x-12x+3x-4x²

E= -12x^3+14x²-12x