展开 (2(2x-y))/x

解答

展开

\frac{2 ( 2 x - y )}{x}

4 - \frac{2 y}{x}

求解步骤

\frac{2 ( 2 x - y )}{x}

乘开

2 (2 x - y) : 4 x - 2 y

= \frac{4 x - 2 y}{x}

使用分式法则:

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

\frac{4 x - 2 y}{x} = \frac{4 x}{x} - \frac{2 y}{x}

= \frac{4 x}{x} - \frac{2 y}{x}

消掉

\frac{4 x}{x} : 4

= 4 - \frac{2 y}{x}

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

e x p an d \frac{( x ^{2} + 1 ) ( x ^{2} - 2 )}{x ^{\frac{2}{3}}}

e x p an d \frac{x - 4}{3 x ^{2}}

e x p an d \frac{- 1 + 4 a}{3 ( - 1 + a )}

e x p an d 1 + x^{- 2}