yang ngerti tolong bantu jawab ya

²loga + ²logb = 12
²log (a.b) = 12
a.b = 2¹²
b = 2¹²/a ......... (1)

3.²loga - ²logb = 4
²loga³ - ²logb = 4
²log (a³/b) = 4
a³/b = 2⁴
a³ = 2⁴. b ............(2)

subtitusi (1) ke (2):
a³= 2⁴.(2¹²/a)
a⁴=2^16
a⁴= (2⁴)⁴
a= 2⁴ = 16

(1):
b= 2¹²/a = 2¹²/2⁴ = 2^8
b= 256

jadi, a + b = 16 + 256 = 272 (B)