Réponse:
1) (((10 - 3) × 2) + 6) - 2 × 10 = ((7 × 2) + 6) - 2 × 10 = (14 + 6) - 2 × 10 = 20 - 2 × 10 = 20 - 20 = 0
(((-4 - 3) × 2) + 6) - 2 × (-4) = ((-7 × 2) + 6) - 2 × (-4) = (-14 + 6) - 2 × (-4) = -8 - 2 × (-4) = -8 - (-8) = 0
2) Il semble toujours donner 0 comme résultat.
(((x - 3) × 2) + 6) - 2 × x = (((x - 3) × 2) + 6) - 2x = 2x - 6 + 6 - 2x = 2x - 2x = 0