Question

решите уравнение ;"(1-х)^2 + х^2 = х

Answer 1

1-2х+х^2+х^2=х
1-2х+2х^2=х
2х^2-3х+1=0
Д=9-8=1
х1=3+1/4=1
х2=3-1/4=1/2