[tex]\displaystyle (2x-1)^4+(2x-1)^2-2=0\\t^2+t-2=0\\t=-2,t=1\\(2x-1)^2=-2;(2x-1)^2=1\\x \notin R, x=0,x=1\\x_1=0,x_2=1[/tex]
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[tex]\displaystyle (2x-1)^4+(2x-1)^2-2=0\\t^2+t-2=0\\t=-2,t=1\\(2x-1)^2=-2;(2x-1)^2=1\\x \notin R, x=0,x=1\\x_1=0,x_2=1[/tex]