Bonsoir,
Exercice 1 :
E = 3(x + 6)
= 3 * x + 3* 6
= 3x + 18
F = 6(4x - 9 )
= 6* 4x - 6*9
= 24x - 54
H = -8z(4-3z)
= -8z*4 - (-8z*3z)
= -32z + 24z^ ( au carré)
I = 4x(x+3)
= 4x*x + 4x*3
= 4x^ ( au carré ) + 12x
J= -5y( 2y+8)
= -5y*2y +-5y*8
= -10y^( au carré) -40y
K = -3y(4-8y)
= -3y*4 - ( -3y *8y)
= -12y + 24y^ ( au carré )
