Réponses

2013-02-22T19:39:48+01:00
16-(7x+3) = (-7x+7)(7x+1) 16-7x-3 = -49x^2-7x+49x+7 -7x+49x^2-49x+7x = -16+3+7 49x^2-49x = -6 49x(x-1) = -6