分式的通分 m÷m²-6m+9 -3m÷2m²-18 1÷2m+6 怎么通分

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/ 是分数线,分数线左边为分子、右边为分母m/(m²-6m+9)=m/(m-3)²-3m/(2m²-18)=-3m/[2(m²-9)]=-3m/[2(m+3)(m-3)]1/(2m+6)=1/[2(m+3)]以上三个分式的最简公分母是2(m+3)(m-3)²m/(m-3)²=[...