HELP!

分类: 作业答案 • 2022-06-04 10:46:05

问题描述：

HELP!
[2+(根号2)/2-(根号2)]^2+[2-(根号2)/2+(根号2)]
[2+(根号2)/2-(根号2)]^2+[2-(根号2)/2+(根号2)]^2
题错了不好意思~^^;

答

最后一个有没有^2呵呵设2=A,(根号2)/2-(根号2)=B则[2+(根号2)/2-(根号2)]^2=A+B-(根号2)/2+(根号2)= -B则,2-(根号2)/2+(根号2)=A-B原式=(A+B)^2-(A-B)^2=2(A^2+B^2)=2{2^2+[(√2/2)-√2]^2}=2{4+[(1/2)-2*√2/2*√2+...

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初二代数 help!
help

HELP!

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