计算:({-1+根号3}/2)^2

问题描述:

计算:({-1+根号3}/2)^2

计算:
({-1+根号3}/2)^2
={-1+根号3}^2/4
=(1-2根号3+3)/4
=(4-2根号3)/4
=1-1/2根号3