tolong dijawab no.12 dan 13 isi caranya

12. b 5
13. a 6
semoga bermanfaat

12. 2^3 . 2^2 =2^m
2^3+2 = 2^m
2^5 = 2^m
m=5

13. misalkan 2^3=a
a+3(a)+4(a)=2^n
8a = 2^n
8(2^3) =2^n
2^3. 2^3 = 2^n
2^3+3 = 2^n
2^6= 2^n
n=6