展开 s((17pi)/(30)-a)

解答

展开

s (\frac{17 π}{30} - a)

\frac{17 π s}{30} - a s

求解步骤

s (\frac{17 π}{30} - a)

使用分配律:

a (b - c) = ab - a c

a = s, b = \frac{17 π}{30}, c = a

= s \frac{17 π}{30} - s a

= \frac{17 π}{30} s - a s

乘

\frac{17 π}{30} s : \frac{17 π s}{30}

= \frac{17 π s}{30} - a s

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