bagaimana caranya nomor 5 dan 6?

[tex] = 8 {}^{ \frac{2}{3} } . \frac{1}{ {2}^{3} } - \frac{1}{ {3}^{2} } \\ = (2 {}^{3}) {}^{ \frac{2}{3} } . \frac{1}{8} - \frac{1}{9 } \\ = 2 {}^{2} . \frac{1}{8} - \frac{1}{9} \\ = \frac{4}{8} - \frac{1}{9} \\ = \frac{36 - 8}{72} \\ = \frac{28}{72} = \frac{7}{18} \\ jawabannya \: d \: \: thanks[/tex]
nomor 5 jawaban D
[tex]2 \sqrt{32} - \sqrt{128} + \sqrt{2 } \\ 2 \sqrt{16.2} - \sqrt{64.2} + \sqrt{2} \\ 8 \sqrt{2} - 8 \sqrt{2} + \sqrt{2} \\ \sqrt{2} [/tex]
nomor 6 jawaban nya A

semoga membantu dan bermanfaat makasih