a, \(5x^2+5y^2+8xy-2x+2y+2=0\)
\(\Leftrightarrow\left(4x^2+4y^2+8xy\right)+\left(x^2-2x+1\right)+\left(y^2+2y+1\right)=0\)
\(\Leftrightarrow\left(2x+2y\right)^2+\left(x-1\right)^2+\left(y+1\right)^2=0\)
\(\Leftrightarrow\left\{{}\begin{matrix}\left(2x+2y\right)^2=0\\\left(x-1\right)^2=0\\\left(y+1\right)^2=0\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}2x+2y=0\\x-1=0\\y+1=0\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}2.1-2.1=0\\x=1\\y=-1\end{matrix}\right.\)
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b, \(y^2+2y+4^x-2^{x+1}+2=0\)
\(\Leftrightarrow\left(y^2+2y+1\right)+\left(4^x-2^{x+1}+1\right)=0\)
\(\Leftrightarrow\left(y+1\right)^2+\left(2^x-1\right)^2=0\Leftrightarrow\left\{{}\begin{matrix}\left(y+1\right)^2=0\\\left(2^x-1\right)^2=0\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}y+1=0\\2^x-1=0\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}y=-1\\2^x=1\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}y=-1\\x=0\end{matrix}\right.\)
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Bn Trần Quốc Lộc làm phần b r , mk chỉ lm phần a thôi nha bn
