nomor 6 - 8 saja yang sama caranya ya tapi yang benar

6. (64^⅓)^-2 = (64^1/3)^-2
= (4^3x-2/3)^-2
= 4^-2
= 1/4^2
= A. 1/16

7. 3√12 + √75 - 2√27
= 3 √4 √3 + √25 √3 - 2 √9 √3
= 3 x 2 √3 + 5 √3 - 2 x 3 √3
= ( 6 + 5 - 6 √3
= C. 5√3

8. 8 / = 8 / x 3 - √7 /
3 + √7 3 + √7 3 - √7
= 8 ( 3 - √7) /
9 - 7
= 8 ( 3 - √7) /
2
= D. 4 ( 3 - √7 )

Maaf kalau salah