x не равен 1
замена
x-1=a
1/a^2-2/a=0
a-1/2=0
a=1/2
x-1=1/2
x=1+1/2
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x не равен 1
замена
x-1=a
1/a^2-2/a=0
a-1/2=0
a=1/2
x-1=1/2
x=1+1/2