①原式=√(15×5/3×1/24)
=√25/24
=5/12√6
②原式=-√(12×2×1/30)
=-√(4/5)
=-2/5√5
③原式=-√(3×8×1/18)
=-√(4/3)
=-2/3√3
④原式=-4ab√3b
⑤原式=√(b/2a)
=1/2a√2ab
⑥原式=c/3b√(c/2ab)
=-c/6ab²√2ab
⑦ 0<a≤1
①原式=√(15×5/3×1/24)
=√25/24
=5/12√6
②原式=-√(12×2×1/30)
=-√(4/5)
=-2/5√5
③原式=-√(3×8×1/18)
=-√(4/3)
=-2/3√3
④原式=-4ab√3b
⑤原式=√(b/2a)
=1/2a√2ab
⑥原式=c/3b√(c/2ab)
=-c/6ab²√2ab
⑦ 0<a≤1