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(-1/4X-2Y)(-1/4X+2Y)时间紧迫!
= = 表示,
人气:184 ℃ 时间:2020-06-12 07:15:07
解答
(-1/4X-2Y)(-1/4X+2Y)
=(-1/4x)^2-(2y)^2
=1/16x^2-4y^2= = 真够速度昂……望采纳~O(∩_∩)O~
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