Réponses

2014-04-17T11:01:39+02:00
C = 2x² -2x-7x² +3x
c = 2x²-7x² -2x+3x
c = -5x² +x

d = -3 +3a  -1 -5a
d = 3a-5a -3-1
d = -2a -4

e = 2x-4y+5 +5y -3x+7
e = 2x -3x -4y +5y +5+7
e = -x +y +12