4*0.625^2-4*0.375^2

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4*0.625^2-4*0.375^2
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4*0.625^2-4*0.375^2
4*0.625^2-4*0.375^2

4*0.625^2-4*0.375^2
为你提供精确解答
4*0.625^2-4*0.375^2=4*(0.625^2-0.375^2)
=4*(0.625+0.375)*(0.625-0.375)
=4*1*0.25
=1
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