please jwab scepatnya

Materi : Eksponen
Kelas : X

6.) (-b^7)^8
= (-b^7.8) = (-b^56) = b^56

7.) (-a^5) (-b^5×3)
= 1/a^5 (1/b^15)

8.) (3a^2)(-6b^5×5) = (3a^2) (-6b^25) = -18a^2.b^25

Semoga membantu...