Aidez moi svp merciiiiiiiiiiiiiii
A=15x-12x²-3-28x²+12x
= -40x²+27x-3
B = 10x²-4x+4x-14x²-2x
= -4x²-2x
C = 6-2x(7-6x-2)+10-6x
= 6-2x(5-6x)+10-6x
=16-10x+12x²-6x
= 12x²-16x+16
D = x-x(3-7+x)-2x-(4x-x+2)
= -x-x(x-4)-3x-2
= -4x - 2 -x²+4x
= -2-x²
mais c'était très facile,de la distributivité simple. tu devrais te poser des questions...
A=15x-12x²-3-28x²+12x
= -40x²+27x-3
B = 10x²-4x+4x-14x²-2x
= -4x²-2x
C = 6-2x(7-6x-2)+10-6x
= 12x²-16x+16
D = x-x(3-7+x)-2x-(4x-x+2)
= -2-x²
