Câu 3.Pt $\Leftrightarrow x-1+4(\sqrt{x+3}-2)+2(\sqrt{3-2x}-1)=0$
$\Leftrightarrow x-1+4\frac{(x-1)}{\sqrt{x+3}+2}-2\frac{(x-1)}{\sqrt{3-2x}+1}=0$
$\Leftrightarrow (x-1)(1+\frac{4}{\sqrt{x+3}+2}-\frac{4}{\sqrt{3-2x}+1})=0$
$\Leftrightarrow x=1\vee 1+\frac{4}{\sqrt{x+3}+2}-\frac{4}{\sqrt{3-2x}+1}=0(1)$
$(1)\Leftrightarrow 2(\frac{2}{\sqrt{x+3}+2}-\frac{1}{\sqrt{3-2x}+1})+1-\frac{2}{\sqrt{3-2x}+1}=0$
$\Leftrightarrow 2\frac{2\sqrt{3-2x}-\sqrt{x+3}}{(\sqrt{x+3}+2)(\sqrt{3-2x}+1)}+\frac{\sqrt{3-2x}-1}{\sqrt{3-2x}+1}=0$
Nhân liên hợp tiếp tục là xong