(40分!!!!)1條數學問題......唔該幫下手!!!

√125/6 - 8/√45

= √(53)/6 – 8 /√(5 x 32)

= 5√5 /6 – 8 /(3√5)

= 5√5 /6 – 8√5 / 15

= 3√5 / 10