Jawabanmu

2014-08-12T20:28:00+07:00
(-2p/q)^3.(-q)^4.2/5p^2
= 8p^3/q^3.-q^4.2/25p^2
= 8p^3/q^3.-q^4.2.1/25p^2
= -8p.-2q/25