Sagot :
A = 35x² -25x = 5x(7x-5)
B=3x²-x = x(3x -1)
c=64x+40x² = 8x(5x+8)
D=17x²-51x = 17x(x-3)
E=3x*(-4x)-7+6x²+3*(-5x)-2x*(-4)+5 = -6x²-7x-2
F=x-4x*(-2)-8+2x*7-5x*6x-5 = -30x²+23x-13
G=8x²+(3x²-4x+1)-(7x²-4)-5(-6x+3) = 4x²+26x-10
H=6x²+3-(2x²+x)+(-5x²+3x-7)-(6x²-4) = -7x²+2x
I= 3x(x-2)-2x(x-5) = x²+4x
J=(2x+1)(3x+4) = 6x²+11x+4
K=(3x-5)(2x+7) = 6x²+11x-35
L=(x+5)(x-5)+4(x²+6) = 5x²-1
M=(3x-4)(x-5)-2x+7(x-2) = 3x²-14x+6
N=-5(-2)²-3(-2)+4 = -10
En espérant t'avoir aidé.