Đáp án:
Giải thích các bước giải:
$\text{$\sqrt{2-\sqrt{3}}$}$ $\\\text{$=\sqrt{\dfrac{1}{2}.(4-2\sqrt{3})}$}$ $\\\text{$=\sqrt{\dfrac{1}{2}.(3-2\sqrt{3}+1)}$}$ $\text{$=\sqrt{\dfrac{1}{2}(\sqrt{3}-1)^2}$}$ $\\\text{$=\dfrac{|\sqrt{3}-1|}{\sqrt{2}}$}$ $\text{$=\dfrac{\sqrt{3}-1}{\sqrt{2}}$}$ $\\\text{$=\dfrac{\sqrt{6}-\sqrt{2}}{2}$}$