Réponses

2013-12-14T15:06:17+01:00
(3x+2)²-(5-2x)(3x+2)
développement:
(3x+2)²-(5-2x)(3x+2)
=9x²+12x+4-(15x+10-6x²-4x)
=9x²+12x+4-15x-10+6x²+4x
=15x²+x-6

factorisation:
(3x+2)²-(5-2x)(3x+2)
=(3x+2)(3x+2-5+2x)
=(3x+2)(5x-3)

2013-12-14T15:14:35+01:00
(3x+2)²-(5-2x)(3x+2)
9x²+12x+4-(15x+10-6x²-4x)
9x²+12x+4-15x-10+6x²+4x
15x²+x-6