Jawabanmu

2014-08-13T22:46:30+07:00
(Soal 1) 
(-5)^6 . 25^2 / 125
= 5^6 . 5^4 / 5^3
= 5^10 / 5^3
= 5^10-^3
= 5^7

(Soal 2)
3^7 . 7^3 . 2 / 42^3
= 3^7 . 7^3 . 2 / (2.3.7)^3
= 3^7 . 7^3 . 2 / 2^3 . 3^3 . 7^3
= 3^4 / 2^2