Kak, tolong lah plisss Slesaiin pakek jalan yh, butuh baget kak,,, plissss tolong yh

[tex]a. \: \frac{3}{ \sqrt{6} } = \frac{3}{ \sqrt{6} } \times \frac{ \sqrt{6} }{ \sqrt{6} } = \frac{ \sqrt{6} }{2} \\ b. \: \frac{3}{2 \sqrt{5} } = \frac{3}{2 \sqrt{5} } \times \frac{2 \sqrt{5} }{2 \sqrt{5} } = \frac{3 \sqrt{5} }{10} \\ c. \: \frac{8}{3 + \sqrt{21} } = \frac{8}{3 + \sqrt{21} } \times \frac{3 - \sqrt{21} }{3 - \sqrt{21} } = \frac{24 -8 \sqrt{21} }{ - 12} \\ d. \: \frac{4}{7 - \sqrt{11} } = \frac{4}{7 - \sqrt{11} } \times \frac{7 + \sqrt{11} }{7 + \sqrt{11} } = \frac{28 +4 \sqrt{11} }{ - 38} [/tex]