化简(12/m^2-9)+(2/m+3)
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化简(12/m^2-9)+(2/m+3)化简(12/m^2-9)+(2/m+3)化简(12/m^2-9)+(2/m+3)原式=12/[(m+3)(m-3)]+2(m-3)/[(m+3)(m-3)]=[
化简(12/m^2-9)+(2/m+3)
化简(12/m^2-9)+(2/m+3)
化简(12/m^2-9)+(2/m+3)
原式=12/[(m+3)(m-3)]+2(m-3)/[(m+3)(m-3)]
=[12+2(m-3)]/[(m+3)(m-3)]
=(12+2m-6)/[(m+3)(m-3)]
=(2m+6)/[(m+3)(m-3)]
=2(m+3)/[(m+3)(m-3)]
=2/(m-3)
12/(m^2-9)+2/(m+3)=(12+2m-6)/(m^2-9)=2(m+3)/(m+3)(m-3)=2/(m-3)
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化简(12/m^2-9)+(2/m+3)