A=(5x-2)+4(2x+1)(5x-2)
=(5x-2)(1+4(2x+1))
=(5x-2)(1+8x+4)
=(5x-2)(5+8x)
B=(5x-1)(2x+3)-5x+1
=(5x-1)(2x+3)-(5x-1)
=(5x-1)(2x+3-1)
=(5x-1)(2x+2)
=(5x-1)*2(x+1)
=2(5x-1)(x+1)
C=7x(2x+3)+2x+3
=7x(2x+3)+(2x+3)
=(2x+3)(7x+1)
D=(7x-2)(x-9)+14x-4
=(7x-2)(x-9)+2(7x-2)
=(7x-2)(x-9+2)
=(7x-2)(x-7)
E=(3x+5)(x-1)+(x-1)
=(x-1)(3x+5+1)
=(x-1)(3x+6)
=(x-1)*3(x+2)
=3(x-1)(x+2)
F=(x+4)2+(x-4)(x+4)+2x+8
=2(x+4)+(x-4)(x+4)+2(x+4)
=(x+4)(2+x-4+2)
=(x+4)(0+x)
=x(x+4)
G=(7x-2)(3x+4)-(3x+4)
=(3x+4)(7x-2-1)
=(3x+4)(7x-3)
H=(2x+6)(x-5)+3x+(-15)
=(2x+6)(x-5)+3x-15
=(2x+6)(x-5)+3(x-5)
=(x-5)(2x+6+3)
=(x-5)(2x+9)
Puisque je n’avais pas la fin du calcul H j’ai pris -15 (vu qu’on peut factoriser avec)