ĐKXĐ: \(x\ge0\)
Đặt \(\sqrt{2x}=a\ge0\Rightarrow2x=a^2\) pt trở thành:
\(a^2+2+2a=2\)
\(\Leftrightarrow a^2+2a=0\)
\(\Leftrightarrow a\left(a+2\right)=0\Rightarrow\left[{}\begin{matrix}a=0\\a=-2< 0\left(l\right)\end{matrix}\right.\)
\(\Rightarrow\sqrt{2x}=0\Rightarrow2x=0\Rightarrow x=0\)
Mk viet nham!
\(\sqrt{2m}\) là \(\sqrt{2x}\) nha!
Minh tinh ra x = 0, co dung khong?