(2根号5×根号6-根号30)÷根号15
问题描述:
(2根号5×根号6-根号30)÷根号15
答
2根号5×根号6=2根号30
(2根号5×根号6-根号30)=根号30
所以
(2根号5×根号6-根号30)÷根号15
=√30÷√15
=√2