{根号[x÷(x³-2x²)]}÷{[根号x-2]÷(x-2)}
={根号[1÷(x²-2x)]}*{(x-2)÷[根号x-2]}
=根号[1÷(x²-2x)]*[根号x-2]
=根号[1÷x]
=根号x /x