展开 (4(s+2))/((s^2+1)(s-2))

解答

展开

\frac{4 ( s + 2 )}{( s ^{2} + 1 ) ( s - 2 )}

\frac{4 s + 8}{s ^{3} - 2 s ^{2} + s - 2}

求解步骤

\frac{4 ( s + 2 )}{( s ^{2} + 1 ) ( s - 2 )}

乘开

(s^{2} + 1) (s - 2) : s^{3} - 2 s^{2} + s - 2

= \frac{4 ( s + 2 )}{s ^{3} - 2 s ^{2} + s - 2}

乘开

4 (s + 2) : 4 s + 8

= \frac{4 s + 8}{s ^{3} - 2 s ^{2} + s - 2}

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