根号24 =2√6
根号5分之3 =√15/5
根号3.2=4√5/5
3根号12-根号48 =2√3
根号9分之2+根号50-根号72 =√2/3+5√2-6√2=-2√2/3
根号18-根号32-根号8分之1 根=3√2-4√2-√2/4=-5√2/4