Réponses

  • Utilisateur Brainly
2013-09-08T18:13:11+02:00
(2x-2)/(2x+1)=2-(2x)/(2x-1)
(2x-2)(2x-1)/(4x²-1)=2(4x²-1)/(4x²-1)-(2x)(2x+1)/(4x²-1)
((2x-2)(2x-1)-2(4x²-1)+(2x)(2x+1))/(4x²-1)=0
(4-4x)/(4x²-1)=0
(x-1)/(4x²-1)=0
x-1=0
x=1