Réponses

Meilleure réponse !
2014-04-14T20:42:09+02:00
(3x-2)-(4x-5)(3x+2)+3x(x+3)
=(3x-2)-(12x²+8x-15x-10+3x²+9x)
=(3x-2)-(12x²+3x²+8x-15x+9x-10)
=(3x-2)-(15x²+2x-10)
=(3x-2-15x²-2x+10)
=3x-2x-15x²-2+10
=x-15x²+8