展开 (9(1-40b-56c))/8

解答

展开

\frac{9 ( 1 - 40 b - 56 c )}{8}

\frac{9}{8} - 45 b - 63 c

求解步骤

\frac{9 ( 1 - 40 b - 56 c )}{8}

乘开

9 (1 - 40 b - 56 c) : 9 - 360 b - 504 c

= \frac{9 - 360 b - 504 c}{8}

使用分式法则:

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

\frac{9 - 360 b - 504 c}{8} = \frac{9}{8} - \frac{360 b}{8} - \frac{504 c}{8}

= \frac{9}{8} - \frac{360 b}{8} - \frac{504 c}{8}

数字相除:

\frac{360}{8} = 45

= \frac{9}{8} - 45 b - \frac{504 c}{8}

数字相除:

\frac{504}{8} = 63

= \frac{9}{8} - 45 b - 63 c

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