(根号32+根号0.75)-(2倍根号3分之1+根号8分之1)
=4√2+√3/4-2√1/3-√1/8
=4√2+1/2√3-2/3√3-1/4√2
=15/4√2-1/6√3
(a倍的根号a分之1+根号4b）－（2分之根号a－b倍的根号b分之1）
=a√1/a+√4b-1/2√a+b√1/b
=√a+2√b-1/2√a+√b
=1/2√a+3√b