展开 (20(s+1))/(s(5s^2+6s+2))

解答

展开

\frac{20 ( s + 1 )}{s ( 5 s ^{2} + 6 s + 2 )}

\frac{20 s + 20}{5 s ^{3} + 6 s ^{2} + 2 s}

求解步骤

\frac{20 ( s + 1 )}{s ( 5 s ^{2} + 6 s + 2 )}

乘开

s (5 s^{2} + 6 s + 2) : 5 s^{3} + 6 s^{2} + 2 s

= \frac{20 ( s + 1 )}{5 s ^{3} + 6 s ^{2} + 2 s}

乘开

20 (s + 1) : 20 s + 20

= \frac{20 s + 20}{5 s ^{3} + 6 s ^{2} + 2 s}

e x p an d (- x^{2} + 0.5 x + 5) d x

e x p an d (a + 5) - \frac{b}{b - 4} + \frac{2 ( b + 3 )}{a}

s im pl i f y (\frac{a}{6} + \frac{b ^{3}}{5}) (\frac{a}{6} - \frac{b ^{3}}{5})

e x p an d \frac{2 a}{5 ( a - b )}

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