(log6 4+2 lo6 3)•log5125
(log₆ 4+2 log₆ 3)•log₅125 = (log₆ 4+ log₆ 3²)•log₅125 = (log₆ 4+ log₆ 9)•log₅125 = (log₆ 4·9)•log₅125 = log₆36 · log₅125 = 2 · 3 = 6