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4(x-y)²-2(x-y) 因式分解
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推荐答案 2013-02-05
4(x-y)²-2(x-y)
=2(x-y) 【2(x-y) -1】
=2(x-y)(2x-2y-1)
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其他回答
第1个回答 2013-02-05
4(x-y)²-2(x-y) = 4(x-y)²-2(x-y)+1/4-1/4 = (2(x-y)-1/2)²-1/4 = (2(x-y)-1/2-1/2)*(2(x-y)-1/2+1/2)
= (2x-2y-1)*(2x-2y)
第2个回答 2013-02-05
2(x-y)(2x-2y-1)
第3个回答 2013-02-05
=2(x-y)*(2x-2y-1)
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