展开 (3(-17-5x))/4

解答

展开

\frac{3 ( - 17 - 5 x )}{4}

- \frac{51}{4} - \frac{15 x}{4}

求解步骤

\frac{3 ( - 17 - 5 x )}{4}

乘开

3 (- 17 - 5 x) : - 51 - 15 x

= \frac{- 51 - 15 x}{4}

使用分式法则:

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

\frac{- 51 - 15 x}{4} = - \frac{51}{4} - \frac{15 x}{4}

= - \frac{51}{4} - \frac{15 x}{4}

e x p an d C (- 5, - 12)

e x p an d (m - n^{2}) (am -, - 3)

e x p an d \frac{2}{x ( x - 1 ) ( x + 1 )}

e x p an d \frac{x - 7}{( x + 2 ) ( x - 1 )}

e x p an d \frac{\frac{d}{d x} ( - x ^{2} + 2 )}{( x ^{2} + 2 ) ^{2}}