展开 5((4x-3)/(25))

解答

展开

5 (\frac{4 x - 3}{25})

\frac{4 x}{5} - \frac{3}{5}

求解步骤

5 (\frac{4 x - 3}{25})

去除括号:

(a) = a

= 5 \cdot \frac{4 x - 3}{25}

分式相乘:

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

= \frac{( 4 x - 3 ) \cdot 5}{25}

约分:

5

= \frac{4 x - 3}{5}

使用分式法则:

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

\frac{4 x - 3}{5} = \frac{4 x}{5} - \frac{3}{5}

= \frac{4 x}{5} - \frac{3}{5}

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