bonsoir
e = 3x*2x+5*2x+5*4 +4x*3x+2*3x+2*5
e =6x²+12x+10x+20 +12x²+20x+6x+10
e = 18x²+48x+30
f =4x*3x+4x*-2+8*3x+8*-2+4*5-2x*5-2x*4x
f =12x²-8x+24x-16+20+16x-10x-8x²
f = 4x²+22x+4
g =5x*2x +5x*6 -3*2x -3*6 -( 6x*4x +6x*2 +5 *4x+5*2)
g =10x²+30x-6x-18 -(24x²+12x+20x+10)
g = 10x²+24x-18 -24x²-32x-10
g = -14x²-8x-28
h =4*-2x +4*7 -5x*-2x-5x+7 -(2x*5x+2x*-3 -4*5x-4*-3)
h =-8x+28 +10x²-35x -(10x²-6x-20x+12)
h = 10x²-43x+28 -10x²+26x-12
h = -17x+16
