(根号7+根号3)(10-2根号21)/根号7-根号3

问题描述:

(根号7+根号3)(10-2根号21)/根号7-根号3
求详解.

(根号7+根号3)(10-2根号21)/根号7-根号3
=(√7+√3)(√7-√3)²/(√7-√3)
=(√7+√3)(√7-√3)
=7-3
=4