Réponse:
F=x²(2x-1-3x-2+4)
=x²(_x+1)
G=(x-4)(x-4+3x-2)
=(x-4)(-2x-6)
Q=(x-2)(3x+1-2(x-2)(x+1)-3)
=(x-2)(3x+1-2(x²+x-2x-2)-3)
=(x-2)(3x+1-2(x²-x-2)-3)
=(x-2)(3x+1_2x²+2x+4_3)
=(x-2)(5x+2-2x²)
