展开 ((s(s+2)))/((s^2+4))

解答

展开

\frac{( s ( s + 2 ) )}{( s ^{2} + 4 )}

\frac{s ^{2} + 2 s}{s ^{2} + 4}

求解步骤

\frac{s ( s + 2 )}{s ^{2} + 4}

乘开

s (s + 2) : s^{2} + 2 s

= \frac{s ^{2} + 2 s}{s ^{2} + 4}

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

e x p an d (- 2 + i) (i + 1) ((- 2 + i)^{2} + 4 (- 2 + i) + 8)

e x p an d \frac{( 59 e ^{6} 10 e ^{9} ) - 29}{69}

e x p an d \frac{4 27}{4 3}

e x p an d \frac{1}{( x ^{2} + 4 ) ( x ^{2} + 9 )}