展开 (27*(s+2))/2

解答

展开

\frac{27 \cdot ( s + 2 )}{2}

\frac{27 s}{2} + 27

求解步骤

\frac{27 ( s + 2 )}{2}

乘开

27 (s + 2) : 27 s + 54

= \frac{27 s + 54}{2}

使用分式法则:

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

\frac{27 s + 54}{2} = \frac{27 s}{2} + \frac{54}{2}

= \frac{27 s}{2} + \frac{54}{2}

数字相除:

\frac{54}{2} = 27

= \frac{27 s}{2} + 27

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