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(m-3分之m-m+3分之3m)除以m平方-9分之6m
=[(m-3)(m+3)分之m(m+3)-(m-3)(m+3)分之3m(m-3)] ×6m分之(m+3)(m-3)
=[(m-3)(m+3)分之(m²+3m-3m²+9m)] ×6m分之(m+3)(m-3)
=[(m-3)(m+3)分之12m ×6m分之(m+3)(m-3)
=2
=[(m-3)(m+3)分之m(m+3)-(m-3)(m+3)分之3m(m-3)] ×6m分之(m+3)(m-3)
=[(m-3)(m+3)分之(m²+3m-3m²+9m)] ×6m分之(m+3)(m-3)
=[(m-3)(m+3)分之12m ×6m分之(m+3)(m-3)
=2
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