展开 (2(x-3))/x

解答

展开

\frac{2 ( x - 3 )}{x}

2 - \frac{6}{x}

求解步骤

\frac{2 ( x - 3 )}{x}

乘开

2 (x - 3) : 2 x - 6

= \frac{2 x - 6}{x}

使用分式法则:

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

\frac{2 x - 6}{x} = \frac{2 x}{x} - \frac{6}{x}

= \frac{2 x}{x} - \frac{6}{x}

消掉

\frac{2 x}{x} : 2

= 2 - \frac{6}{x}

e x p an d \frac{7 x - 6}{( 3 x - 1 ) ( 2 x - 1 )}

e x p an d (1 + 2 x + x^{2})^{6}

e x p an d (x - 2) 35 6^{^{'}}

e x p an d ln (a x + b) \cdot 2 x \cdot (a x + b)

e x p an d (4 x + 7 y = 3, 7) (3 x - y = 16)