[2+(根号2)/2-(根号2)]^2+[2-(根号2)/2+(根号2)]^2
问题描述:
[2+(根号2)/2-(根号2)]^2+[2-(根号2)/2+(根号2)]^2
答
(2+√2/2-√2)^2+(2-√2/2+√2)^2=2*2*2+(√2/2-√2)^2*2=8+1/2*2=9
[2+(根号2)/2-(根号2)]^2+[2-(根号2)/2+(根号2)]^2
(2+√2/2-√2)^2+(2-√2/2+√2)^2=2*2*2+(√2/2-√2)^2*2=8+1/2*2=9