Réponses

2013-09-25T17:22:53+02:00
2(x + 3 ) = 2 * x + 2 * 3
3(y+5) = 3 * y + 3 * 5
2(x-6) = 2 * x + 2 * (-6)
3y(-9-y) = 3y * (-9) + 3y * (-y)