一寸的照片像素:计算题,急急急!

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( 1/1 + 根号3 - 1/1 - 根号3)的平方

要有过程!
我问的是:( 1/(1 + 根号3) - 1/(1 - 根号3))的平方

要用简便方法做
要有过程
急死我了!

=3.
过程:[1/(1+√3)-1/(1-√3)]2
=[(1-√3)-(1+√3)/(1+√3)*(1-√3)]2
=[-2√3/(1-3)]2
=12/4
=3

(1 ÷ 1 + √3 -1 ÷ 1 - √3)2
=(1 + 1.73205080756 - 1 - 1.73205080756)2
=(2.73205080756 - 1 - 1.73205080756)2
=(1.73205080756 - 1.73205080756)2
=(0)2
=0

(1 ÷ 1 + √3 -1 ÷ 1 - √3)2
=(1 + 1.73205080756 - 1 - 1.73205080756)2
=(2.73205080756 - 1 - 1.73205080756)2
=(1.73205080756 - 1.73205080756)2
=(0)2
=0

=(1-1+0)平方
=0

3