(1)原式
=2×2√3+3√3
=4√3+3√3
=7√3
(2)原式
=3√2-3√2/2
=3√2/2
(4)原式
=2x√y/(3√xy)
=2x/(3√x)
=2√x/3
(5)原式
=√125
=√(5²×5)
=5√5