Himpunan penyeselaian: log x + log(x - 3) = 1

log x + log(x - 3) = 1
log(x(x - 3)) = log10
log(x² - 3x) = log10
↔ x² - 3x = 10
↔ x² - 3x - 10 = 0
↔ (x + 2) (x - 5) = 0
↔ x = -2   atau  x = 5

x = -2 tidak memenuhi,

jadi HP = {5}