svp developper et reduire 1000 merci a qui m aide dans piece jointe
Bonsoir
a = (x+2)(x+3) = x²+3x+2x+6 = x² +5x+6
b= (x-4)(x+5) = x²+5x-4x-20 = x² +x -20
c= (x-1)'x-4) = x²-4x-x+4 = x² -5x +4
d = (2x+3)(4x+2) = 8x² +4x +12x +6 = 8x² +16x +6
