Trl :
\(\left(x-2\right)^2+\left(y-3\right)^2=0\)
Ta thấy :
\(\left(x-2\right)^2\ge0\)
\(\left(y-3\right)^2\ge0\)
\(\Rightarrow\hept{\begin{cases}\left(x-2\right)^2=0\\\left(y-3\right)^2=0\end{cases}}\)
\(\Rightarrow\hept{\begin{cases}x-2=0\\y-3=0\end{cases}}\)
\(\Rightarrow\hept{\begin{cases}x=2\\y=3\end{cases}}\)
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