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计算:[(x+2y)(x-2y)+(x-2y)^2]÷(6x)
人气:318 ℃ 时间:2020-04-07 04:53:40
解答
[(x+2y)(x-2y)+(x-2y)^2]÷(6x)
=[(x-2y)(x+2y+x-2y)]÷(6x)
=[2x(x-2y)]÷(6x)
=(x-2y) / 3
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