Réponses

2014-04-11T16:13:24+02:00
A) si x=0
A=(2-0)(0+3=2*3=6
B=(0+6)-(0+2)*0=6

si x=1
A=(2-5)(4+3)=-3*7=-21
B=(1+6)-(5+2)*4=7-4*7=-21

b) A=(2x-5)(4x+3)=8x²+6x-20x-15=8x²-14x-15
B=(x+6)-(5x+2)4x=x+6-20x²-8x=-20x²-7x+6

Donc A≠B