\(DK:x\ge\frac{2019}{2020}\)
\(\Leftrightarrow\left(2020x-2019-2\sqrt{2020x-2019}+1\right)+\left(x^2-2x+1\right)=0\)
\(\Leftrightarrow\left(\sqrt{2020x-2019}-1\right)^2+\left(x-1\right)^2=0\)
\(\Leftrightarrow\hept{\begin{cases}\sqrt{2020x-2019}-1=0\\x-1=0\end{cases}}\)
\(\Leftrightarrow x=1\left(n\right)\)
Vay nghiem cua PT la \(x=1\)