(x-2)\(^2\)=(x-2)\(^4\)
\(\Leftrightarrow\)(x-2)(x-2)=(x-2)(x-2)(x-2)(x-2)
\(\Leftrightarrow\)(x-2)(x-2)-(x-2)(x-2)(x-2)(x-2)=0
\(\Leftrightarrow\)(x-2)(x-2)=0
\(\Leftrightarrow\)(x-2)^2=0
\(\Leftrightarrow\)x-2=0
\(\Leftrightarrow\)x=2
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