原式=根号5+根号15*(2根号3+1)/(12-1)-根号5-根号3+3
=6根号5/11+根号15/11-根号3+3请再看看OK根号7 + 2根号6 + 根号5 (根号7+根号6)+(根号6+根号5)--------------------------------------- =----------------------------------------------根号30 + 6 +根号35 +根号42 (根号6+根号7)*(根号5+根号6)11=---------------- +---------------- =根号6-根号5+根号7-根号6=根号7-根号5根号6+根号5 根号7+根号6原来那题应该是根号15 - 根号5 - 根号3 +3-------------------------------------根号5 +2乘以根号3- 12乘以根号3是个整体 求助根号15 - 根号5 - 根号3 +3 (根号5+根号3)(根号3-1)1-------------------------------------=----------------------------------------=-------------------------根号5 +2乘以根号3- 1 (根号5+根号3)+(根号3-1) 1 1---------+--------------- 根号3-1根号5+根号312 2(根号5+1)根号5+1 =----------------------------=----------=----------------=--------------根号3+1根号5-根号3根号5-1 5-12----------+---------------2 2
