Réponse:
bonjour
a. (x+6 )= x6(x -6)= -6x + 6x = x
b. (3x+2)= 5x (3x-2)= 1x 5x+1x=6x
c. (5×-4)= 1x(5x+4)=9x 9x+1x = 10x
d.(6x-5)=1x (6x+5)=11x = 11x + 1x = 12x
derien bonne nuit
