展开 ((2x(200-4x)))/3

解答

展开

\frac{( 2 x ( 200 - 4 x ) )}{3}

- \frac{8 x ^{2}}{3} + \frac{400 x}{3}

求解步骤

\frac{2 x ( 200 - 4 x )}{3}

乘开

2 x (200 - 4 x) : 400 x - 8 x^{2}

= \frac{400 x - 8 x ^{2}}{3}

使用分式法则:

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

\frac{400 x - 8 x ^{2}}{3} = \frac{400 x}{3} - \frac{8 x ^{2}}{3}

= \frac{400 x}{3} - \frac{8 x ^{2}}{3}

改写为标准形式

= - \frac{8 x ^{2}}{3} + \frac{400 x}{3}

e x p an d 7 e (5 e - 7) + 2 (9 e^{2} - 8)

e x p an d (X) + (Y Z)

e x p an d (7 e - 4 f)^{2}

e x p an d \frac{30}{\frac{1}{3}}

e x p an d - 2 (2 x - 6 + 1 = 17 - 4 x)