因式分解:(X-2Y)^2+(X-2Y)(2X+Y)=__
人气：261 ℃ 时间：2020-01-29 15:15:00
解答
(X-2Y)^2+(X-2Y)(2X+Y)
=(X-2Y)[(X-2Y)-(2X+Y)]
=(X-2Y)(-X-3Y)
=-(X-2Y)(X+3Y)
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