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数学
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【(x-2y)的平方-4y的平方+2xy]除2x等于多少?
人气:293 ℃ 时间:2019-12-09 05:13:20
解答
(x²-4xy+4y²-4y²+2xy)/2x
=(x²-2xy)/2x
=x/2-ya的平方(x-y)-4b的平方(x-y)(x-y)(a²-4b²)=(x-y)(a+2b)(a-2b)
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