展开 (((2pi-80)x+1260))/9

解答

展开

\frac{( ( 2 π - 80 ) x + 1260 )}{9}

\frac{2 π x}{9} - \frac{80 x}{9} + 140

求解步骤

\frac{( 2 π - 80 ) x + 1260}{9}

乘开

(2 π - 80) x + 1260 : 2 π x - 80 x + 1260

= \frac{2 π x - 80 x + 1260}{9}

使用分式法则:

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

\frac{2 π x - 80 x + 1260}{9} = \frac{2 π x}{9} - \frac{80 x}{9} + \frac{1260}{9}

= \frac{2 π x}{9} - \frac{80 x}{9} + \frac{1260}{9}

数字相除:

\frac{1260}{9} = 140

= \frac{2 π x}{9} - \frac{80 x}{9} + 140

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