Réponse :
A=(3x+2)(2-2x)+(3x+2)(x+4)
=(3x+2)[(2-2x)+(x-4)]
=(3x+2)(2-2x+x-4)
=(3x+2)(-2-x)
B=(x-1)(2x-2)+(2x-2)(5-2x)
=(2x-2)[(x-1)+(5-2x)]
=(2x-2)(x-1+5-2x)
=(2x-2)(4-x)
C=(4-3x)(x+5)-(4-3x)(x+2)
=(4-3x)[(x+5)-(x+2)]
=(4-3x)(x+5-x-2)
=(4-3x)3
=3(4-3x)
D=(2x+5)(x+2)-(2x+5)
=(2x+5)[(x+2)-1]
=(2x+5)(x+2-1)
=(2x+5)(x+1)