Réponse :
bonjour
Explications étape par étape :
A=6d(2-d)+d²
=12d - 6d²+d²
=12d -5d²
=d(12-5d)
B=5d-(3d+2)
B=5d-3d-2
=2d-2
=2(d-1)
D=6d²-10d-4
D= 2(d²-5d-2)
E=(d²- 4d)×(-5)-8d
=-5d²+20d-8d
=-5d²+12d
=d(-5d+12)
F=2d-2
=2(d-2)
G=5d²-6+4
= 5d²-2
H=(1-d)×(-2)= -2+2d
=2(-1+d)
I=-5d²+12d
=d(-5d+12)
J=-d(5d+8)+20d
=-5d²+8d+20d
=d(-5d +28)
B=H
E=I