1、=（9÷3×3/2)√(45÷5/2×8/3) =(9/2)√48 =18√32、a²b√(ab×b/a÷9b²/a) =a²b√(a/9) =a²b/2 √a3、=2√3-√2/2-2/6√6 =2√3-√2/2 -√6/34、=√(1/2×24)-√(3×24) /3 =√12-√72/2 =2√3-3√2
