Đặt y = x- 2 => x = y + 2 thay vào pt ta có
\(\left(y+2-1\right)^4+\left(y+2-3\right)^4=2\Rightarrow\left(y+1\right)^4+\left(y-1\right)^4=2\)
=> \(y^4+4y^3+6y^2+4y+1+y^4-4y^3+6y^2-4y+1=2\)
=> \(2y^4+12y^2+2=2\Rightarrow2\left(y^4+6y^2+1\right)=2\Rightarrow y^4+6y^2+1=1\Rightarrow y^4+6y^2=0\)
=> \(y^2\left(y^2+6\right)=0\)
=> y ^2= 0 \(\left(x^2\ge0=>x^2+6>0\right)\)
=> y = 0
(+) y = 0 => x - 2 = 0 => x = 2
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