Решите уравнения пожалуйста(2х-1)(х+1)-(х-1)(х+1)=х^2.(х^2+1)^2=(х^2-1)(х^2+1)-4х+1.

1-ый:
(2х-1)(х+1)-(х-1)(х+1)=х
(х+1)(2х-1-(х-1))=х
(х+1)(2х-1-х+1)=х
(х+1)х=х
х+х=х
х=0
Второй:
(х+1)=(х-1)(х+1)-4х+1
х+2х+1=х-1-4х+1
2х+1=-4х
2х+4х+1=0
х=-44-421/22
х=-416-8/4
х=-48/4
х=-422/4
х=-4+22/4; х=-4-22/4;
х=-2+2/2; х=-2-2/2;
х1=-2-2/2, х=-2+2/2;
х1-1,70711; х2-0,292893.