mohon bantuannya,terima kasih

jawabanya D
Semoga membantu

[tex]= \frac{ \sqrt{6} }{2 \sqrt{3} + \sqrt{8} } \times \frac{2 \sqrt{3}- \sqrt{8} }{2 \sqrt{3}- \sqrt{8}} \\ \\ = \frac{2 \sqrt{18}- \sqrt{48} }{12-8} \\ \\ = \frac{6 \sqrt{2} -4 \sqrt{3} }{4} \\ \\ = \frac{3}{2} \sqrt{2} - \sqrt{3} \: (D).[/tex]