b) $\sqrt{(2 \sqrt{6}-4)^{2}}+\sqrt{15-6 \sqrt{6}}$

Q: b) $\sqrt{(2 \sqrt{6}-4)^{2}}+\sqrt{15-6 \sqrt{6}}$

<p><span class="math-tex">$\begin{array}{l}\sqrt{(2 \sqrt{6}-4)^{2}}+\sqrt{15-6 \sqrt{6}} \\ =|2 \sqrt{6}-4|+\sqrt{(3-\sqrt{6})^{2}} \\ =2 \sqrt{6}-4+|3-\sqrt{6}| \\ =2 \sqrt{6}-4+3-\sqrt{6} \\ =\sqrt{6}-1\end{array}$</span></p>

Question

Accepted Answer

$\begin{array}{l}\sqrt{(2 \sqrt{6}-4)^{2}}+\sqrt{15-6 \sqrt{6}} \ =|2 \sqrt{6}-4|+\sqrt{(3-\sqrt{6})^{2}} \ =2 \sqrt{6}-4+|3-\sqrt{6}| \ =2 \sqrt{6}-4+3-\sqrt{6} \ =\sqrt{6}-1\end{array}$

Đề thi cuối kì 1 (CT) 19-20 - H. Củ Chi - Tp. Hồ Chí Minh - MĐ 6125