Réponses

2014-02-05T16:40:54+01:00
Factoriser: (3x+1)^2-(2x+4)^2
(3x+1)2-(2x+4)2 est de la forme a2 - b2 = (a + b)(a - b)
(3x+1 -2x-4)(3x+1+2x +4)
(x-3)(5x+5)