2logx(2logx-3)=2log16 pakai cara ya...

umpamakan
²log x = a

a(a-3) = ²log 16

a² - 3a = 4

a² - 3a -4 = 0

(a -4) (a +1) = 0

a = 4 atau a = -1

2log x = 4 atau 2 log x = -1

x = 16 atau x = 1/2