化简 x(250-x/(20))

解答

化简

x (250 - \frac{x}{20})

\frac{x ( 5000 - x )}{20}

求解步骤

x (250 - \frac{x}{20})

合并

250 - \frac{x}{20} : \frac{5000 - x}{20}

= x \frac{5000 - x}{20}

使用分式法则:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{x ( 5000 - x )}{20}

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