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(x-2y)²-x²-2xy因式分解
人气:122 ℃ 时间:2019-08-22 22:14:17
解答
(x-2y)²-x²-2xy
=(x-2y)²-x(x+2y)
=(x+2y)[(x+2y)-x]
=(x+2y)(x+2y-x)
=2y(x+2y)
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