Réponses

2014-10-15T15:15:05+02:00
-(2x +3) (3-9x) + (-8x -5) (8-4x)
-2x+3 (3-9x) + (-8x -5) (8-4x)
-2x +9 -27x -64x +32x² - 40 -20x
32x² -113x -31