tolong bantu caranya

4. a.
[tex] \frac{4}{\sqrt{6} } \times \frac{ \sqrt{6} }{ \sqrt{6} } = \\ \frac{4 \sqrt{6} }{6} = \\ \frac{2 \sqrt{6} }{3} [/tex]

b.
[tex] \frac{2 \sqrt{5} }{ \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \\ \frac{2 \sqrt{15} }{3}[/tex]

5. a.
[tex] \frac{3}{ \sqrt{5} + \sqrt{2} } \times \frac{ \sqrt{5} - \sqrt{2} }{ \sqrt{5} - \sqrt{2} } = \\ \frac{3( \sqrt{5} - \sqrt{2}) }{3} = \\ \sqrt{5} - \sqrt{2} [/tex]

b.
[tex] \frac{3 \sqrt{5} - 2 \sqrt{3} }{ \sqrt{5} + 4 \sqrt{ 3} } \times \frac{ \sqrt{5} - 4 \sqrt{3} }{ \sqrt{5} - 4 \sqrt{3} } \\ \frac{15 - 14 \sqrt{15} + 24 }{5 - 39} \\ \frac{39 - 14 \sqrt{15} }{ - 34} [/tex]

sorry klo salah