Réponses

2013-12-08T10:54:43+01:00
=-3x² +12x +5x -2x² -10 + 4 x=
-5x²  +21x -10
2013-12-08T10:58:18+01:00
= -3x(x-4)+(x-2)(5-2x)= -3x²+12x+5x-2x²-10+4x
= -5x²+21x-10