Réponses

2014-10-16T17:59:52+02:00
= 3 ( x - 1 ) + 2 ( x + 3 )
= 3 * x + 3 * ( - 1 ) + 2 * x + 2 * 3
= 3x - 3 + 2x + 6
= 5x + 3