ĐKXĐ: \(x\ge2017\)
\(\Leftrightarrow\sqrt{x-2017}+2\sqrt{x-2017}=3\)
\(\Leftrightarrow3\sqrt{x-2017}=3\)
\(\Rightarrow\sqrt{x-2017}=1\Rightarrow x=2018\)
b/ \(\Leftrightarrow9xy+3x+6y=15\)
\(\Leftrightarrow3y\left(3x+2\right)+3x+2=17\)
\(\Leftrightarrow\left(3y+1\right)\left(3x+2\right)=17=\left(-17\right).\left(-1\right)=\left(-1\right).\left(-17\right)=1.17=17.1\)
TH1: \(\left\{{}\begin{matrix}3y+1=-17\\3x+2=-1\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}x=-1\\y=-6\end{matrix}\right.\)
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