jika xy= 900 dan log x - log y = 2. maka x-y =

logx-logy=2
log(x/y)=log10^2
x/y=100
x=100y

xy=900
(100y)y=900....(coret nol)
y^2=9
y=√9
y=3

xy=900
3x=900
x=900/3
x=300

x-y=300-2=298