Réponses

2013-05-03T16:30:56+02:00
A=(7-5x)(6x-1)=42x-7-30x^2+5x=-30x^2+47x-7

B=3(1-4x)+(5x+2)(7+x)=3-12x+35x+5x^2+14+2x=5x^2+25x+17
2013-05-03T16:53:23+02:00

A=42x-7-30x^2-5x

A=37x-7-30x^2

 

b=3-12x-35x+5x^2+14+2x

17-45x+5x^2