Bonjour,
Pour x = 2 et y = 5
B = 10 - x (9y - x)
B = 10 - 2 (9 * 5 - 2)
B = 10 - 2 (45 - 2)
B = 10 - 2 * 43
B = 10 - 86
B = - 76.
