Réponses

2014-03-31T17:02:02+02:00
E=(3x+2)²-(5-2x)(3x+2)
E=9x²+12x+4-(15x+10-6x²-4x)
E=9x²+12x+4-15x-10+6x²+4x
E=15x²+x-6

E=(3x+2)²-(5-2x)(3x+2)
E=(3x+2)((3x+2)-(5-2x))
E=(3x+2)(3x+2-5+2x)
E=(3x+2)(5x-3)

Si x=2 E=15*4+2-6=56
2014-03-31T17:06:04+02:00
1) E=(3x+2)²-(5-2x)(3x+2)
E=3x²+2*3*2+2²-(15x+10-6x²-4x)
E=9x²+16-15x-10+6x²+4x
E=15x²-11x+6