coucou
A = x+4(3x + 2)
x+12X+8
13X+8
B = 5x-( x + 1)(6x-2)
5X-(6X au carrer -2X+6X-2)
5X-(6X au carrer+4-2)
5X-6X au carrer-4x+2
X-6X au carrer +2
Bonsoir !
A = x+4(3x+2)
A = x+12x+8 = 13x+8
B = 5x-(x+1)(6x-2)
B = 5x-(6x²-2+6x-2)
B = 5x-6x²+2-6x+2
B = -6x²-x+4
Bon courage.