Yg bisa no. 2 dan no. 3 tolong dibantu.. Jawab 1 saja udah membantu..

2.
[tex] = \frac{3 \sqrt{2} \times \sqrt{75} }{ \sqrt{54} } \\ = \frac{3 \sqrt{2} \times \sqrt{25 \times 3} }{ \sqrt{9 \times 6} } \\ = \frac{3 \sqrt{2} \times 5 \sqrt{3} }{3 \sqrt{6} } \\ = \frac{15 \sqrt{6} }{3 \sqrt{6} } \\ = 5[/tex]
3.
[tex] = \frac{3}{3 + \sqrt{2} } \\ = \frac{3}{3 + \sqrt{2} } \times \frac{3 - \sqrt{2} }{3 - \sqrt{2} } \\ = \frac{9 - 3 \sqrt{2} }{9 - 2} \\ = \frac{9 - 3 \sqrt{2} }{7} [/tex]