ĐKXĐ : \(x\ge-3\)
\(\sqrt{x+3}=x-1\)
\(\Leftrightarrow\left\{{}\begin{matrix}x-1\ge0\\x+3=x^2-2x+1\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}x\ge1\\x^2-3x-2=0\end{matrix}\right.\)
\(\Delta=b^2-4ac=9-1.\left(-4\right).2=17\)
\(\Rightarrow x_1=\dfrac{3-\sqrt{17}}{2};x_2=\dfrac{3+\sqrt{17}}{2}\)
mà \(x\ge1\Rightarrow x=\dfrac{3+\sqrt{17}}{2}\) (TM ĐKXĐ)
Vậy....