请将下列各式约分(初二)(1) m²-3m\9-m² (2)x²+4x+3\x²+x-6(3) 27a³b²c\18a²b³c² (4)9m²-6mn+n²\3m-n写出过程
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![请将下列各式约分(初二)(1) m²-3m\9-m² (2)x²+4x+3\x²+x-6(3) 27a³b²c\18a²b³c² (4)9m²-6mn+n²\3m-n写出过程](/uploads/image/z/12057707-11-7.jpg?t=%E8%AF%B7%E5%B0%86%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%E7%BA%A6%E5%88%86%EF%BC%88%E5%88%9D%E4%BA%8C%EF%BC%89%EF%BC%881%EF%BC%89+m%26sup2%3B-3m%5C9-m%26sup2%3B+++++++++++++++++++%EF%BC%882%EF%BC%89x%26sup2%3B%2B4x%2B3%5Cx%26sup2%3B%2Bx-6%EF%BC%883%EF%BC%89+27a%26sup3%3Bb%26sup2%3Bc%5C18a%26sup2%3Bb%26sup3%3Bc%26sup2%3B++++++++++%EF%BC%884%EF%BC%899m%26sup2%3B-6mn%2Bn%26sup2%3B%5C3m-n%E5%86%99%E5%87%BA%E8%BF%87%E7%A8%8B)
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