Question

(2per3x)^2 kali (3per4) (-y)^-3 : xy^2
x= 1per2 y=1per3

Answer 1

Maaf kalau salah.. :)mungkin begini....
(2/3x)^2 (3/4) (-y)^-3 : xy^2
(2/3(1/2))^2 (3/4) (-1/y^3) : (1/2)(1/3)^2
(2/(3/2))^2 (3/4) (-1/(1/3)^3) : 1/18
(4/3)^2 (3/4) (-1/(1/27)) : 1/18
(16/9) (3/4) (-27) : 1/18
(4/3)(-27) kali (18/1)
(4)(-27)(6)
-648