Aide svp en maths Développer et réduit les expression G= 11+2(x-6)+4(-3x-6) H -2(x-5) -3(7-4x) I = 8+2y-5(2y-6)+4 J= -7_ 4(3y_6)+3+2(3y_7) K= -5z +(z_3)-7(6-8z)

bonsoir

g = 11 + 2 x - 12 - 12 x - 24 
g = - 10 x - 36 +11 = - 10 x - 25

h = - 2 x + 10 - 21 + 12 x
h = 10 x - 11

i = 8 + 2 y - 10 y + 30 + 4
i = - 8 y + 42

j = - 7 - 12 y + 24 + 3 + 6 y - 14
j = - 6 y + 27 - 21 = - 6 y + 6

k = - 5 z² + 15 z - 42 + 24 z
k = - 5 z² + 39 z - 42

G= 11+2(x-6)+4(-3x-6)
=11+2X-12-12X-24
=2X-12X+11-24
=-10X-13

H -2(x-5) -3(7-4x)
=-2X+10-21+12X
=10X-11
I = 8+2y-5(2y-6)+4
=8+2y-10y+30+4
=42-8y
J= -7_ 4(3y_6)+3+2(3y_7)
=-7-12y+24+3+6y-14
=6-6y
K= -5z +(z_3)-7(6-8z)
=-5Z+Z-3-42+56Z
=-4Z+56Z-45
=52Z-45