公分母：m(2m+3)(2m-3)
1/(2m²+3m)=(2m+3)/[m(2m+3)(2m-3)]
(2m+5)/(4m²-9)=(2m²+5m)/[m(2m+3)(2m-3)].
通分1/2m^2+3m與(2m+5)/4m^2-9
通分1/2m^2+3m與(2m+5)/4m^2-9
數(shù)學人氣：424 ℃時間：2020-04-03 13:06:33
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