(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)-(2m-3n)怎么做
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![(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)-(2m-3n)怎么做](/uploads/image/z/1124449-25-9.jpg?t=%28m%26%23178%3B-6mn%EF%BC%8B9n%26%23178%3B%EF%BC%89%C3%B7%EF%BC%88m-3n%EF%BC%89-%EF%BC%884m%26%23178%3B-9n%26%23178%3B%EF%BC%89-%EF%BC%882m-3n%EF%BC%89%E6%80%8E%E4%B9%88%E5%81%9A)
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(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)-(2m-3n)怎么做
(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)-(2m-3n)怎么做
(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)-(2m-3n)怎么做
(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)÷(2m-3n)
=(m-3n)^2÷(m-3n)-(2m+3n)(2m-3n)÷(2m-3n)
=m-3n-(2m+3n)
=-m-6n