作业帮(m-3分之5m+m+3分之2m)*m分之m^2-9
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(m-3分之5m+m+3分之2m)*m分之m^2-9
(m-3分之5m+m+3分之2m)*m分之m^2-9
(m-3分之5m+m+3分之2m)*m分之m^2-9
(m-3分之5m+m+3分之2m)*m分之m^2-9
=5m/(m-3)*(m+3)(m-3)/m+2m/(m+3) *(m+3)(m-3)/m
=5(m+3)+2(m-3)
=7m-9
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原式=5m/(m-3)×(m+3)(m-3)/m+2m/(m+3)×(m+3)(m-3)/m
=5(m+3)+2(m-3)
=7m+9