Réponses

2014-09-18T17:27:06+02:00
A=(2x-3)(x-1)-3(x-1)(x+2)
=(x-1)((2x-3)-3(x+2))
=(x-1)((2x-3)-3x-6)
=(x-1)(-x-9)
B=....
 =(x+1)((x+1)+4(x+5))
................calcule toi..
C=..................
x²-2²+....................
(x-2)(x+2)+......................
(x-2)((x+2)(2x+1))
d=...........................
 =((x+5)+(2x+7))((x+5)-(2x+7))