展开 x((2+x}{-15}-\frac{x-4)/3 =4)

解答

展开

x (\frac{2 + x}{- 15} - \frac{x - 4}{3} = 4)

- \frac{2 x ^{2}}{5} + \frac{6 x}{5} = 4

求解步骤

x (\frac{2 + x}{- 15} - \frac{x - 4}{3} = 4)

= x (\frac{2 + x}{- 15} - 4 = \frac{x - 4}{3})

使用分配律:

a (b - c) = ab - a c

a = x, b = \frac{2 + x}{- 15}, c = \frac{x - 4}{3} = 4

x \frac{2 + x}{- 15} - x \frac{x - 4}{3} = 4

乘开

x \frac{2 + x}{- 15} - x \frac{x - 4}{3} : - \frac{2 x ^{2}}{5} + \frac{6 x}{5}

- \frac{2 x ^{2}}{5} + \frac{6 x}{5} = 4

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

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

s im pl i f y (6 - 3 x + 3)^{2}

e x p an d π (1717 + 55)

e x p an d 3 (u v^{3} + w^{4})^{2} + (u + v e^{w})^{4}