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kedua rus di logkan
(x² + x - 6) log 3 = (x² - 7x + 10)log 4
log 3/log 4 = (x² - 7x + 10)/(x² + x - 6)
log 3 - log 4 = (x - 2)(x - 5)/(x + 3)(x - 2)
log 3 - log 4 = (x - 5)/(x + 3)