DEVELOPPER ET REDUIRE C = 3+(-9+2)*(5x+6) D = (2x-4)*(4x-4)-8² E = -4x+3+(-2x-8)*(7x-5) SVP MERCI

C= 3 + (- 9 + 2) * (5x + 6)
C= 3 + (- 7) * (5x + 6)
C= 3 - 35x - 42
C= - 35x - 39

D= (2x - 4) * (4x - 4) - 8²
D= 8x² - 8x - 16x + 16 - 64
D= 8x² - 24x - 48

E= - 4x + 3 + (- 2x - 8) * (7x - 5)
E= - 4x + 3 - 14x² + 10x - 56x + 40
E= - 14x² - 50x + 43

c=3+(-9)+2*(5x+6)
  =-4(5x+6)
  =-20x-24

d=8x²-8x-16x+16
  =8x²-24x16

e=-4x+3-14x²+10x-56x+40
  =-14x²-50x+43