(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

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