9m²-15m+25/4
=(3m)²-2×(3m)×(5/2)+(5/2)²
=(3m-5/2)²
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因式分解:9m^2-15m+25/4
因式分解:9m^2-15m+25/4
數(shù)學(xué)人氣：293 ℃時間：2020-06-03 02:27:27
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