Réponses

2014-01-11T11:45:12+01:00
Factoriser    5×X+5×3 = 5 * (x +3)
factoriser     9×X-9×4 = 9* (x-4)
developper  7×(X-2) = 7x -14
developper  4×(6+X) = 24+4x