Bonsoir,
A= (x-3)(2x+1+5-x)
A= (x-3)(x+6)
B= (4x+7)(5x+3-8x-5)
B= (x-3)(-3x-2)
C= (7-2x)(4-x-3)
C= (7-2x)(-x+1)
D= (3x+1)(3x+1+7x+6)
D= (3x+1)(10x+7)
E= (4x-1)(5-4x+1)
E= (4x-1)(-4x+6)
F= (7-x)(5-2x-2)
F=(-x+7)(-2x+3)
G= (x+2)(x-3-x-2)
G= - 5(x+2)
H= (4+x)(7x-1-1)
H= (x+4)(7x-2)
I= (x+1)(1+x+1)
I= (x+1)(x+2)