Réponses

2013-05-12T09:47:50+02:00

A=x^2 (x au carré) + 2 + 2x + x

A= x^2 + 2 + 3x

 

B= x^2 -2x + 2 - x

B= x^2 -3x + 2

D= x^2 + 2 + 3x - x^2 + 3x - 2 + x = 6x

C = x^2 + 2 + 3x + x^2 - 3x + 2 = 2x^2 + 4 =

Meilleure réponse !
2013-05-12T10:15:18+02:00

 A=(x^2+2)(x^2+1)
    =x^2+x+2x+2
    = x^2+3x+2
 

B = (x-2) (x-1)

   = x^2 -x -2x+2

   =  x^2-3x+2

 

C = A+B

    = x^2+3x+2+x^2-3x+2

    = 2x^2 +4

 

D=A-B

   = x^2+3x+2 - (x^2-3x+2)

   = x^2+3x+2 - x^2 +3x -2

   = 6x