tolong dengan caranya ya kak

Kelas 9 Matematika
Bab Akar dan Pangkat

^ = pangkat

11] (8 √a) : (4 . a^(-2/3))
= (8 : 4) . (a^1/2 : a^(-2/3))
= 2 . a^(1/2 + 2/3)
= 2 . a^(3/6 + 4/6)
= 2 . a^(7/6)
= 2 . a^(1 1/6)
= 2 . a^1 . a^1/6
= 2a (^6√a)

12] √(4^(4x)) = 8^(3x - 2)
(2²)^(4x/2) = (2^3)^(3x - 2)
4x = 3 (3x - 2)
4x = 9x - 6
6 = 9x - 4x
5x = 6
x = 6/5