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数学
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(2x-y)^2-y(y-4x)-5x^3的差除以2x方的结果
人气:380 ℃ 时间:2020-06-07 03:48:24
解答
原式=(4x²-4xy+y²-y²+4xy-5x³)÷2x²
=(4x²-5x³)÷2x²
=2-2.5x
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