展开 (e^{-s-2})/((s-2)(2s+2))

解答

展开

\frac{e ^{- s - 2}}{( s - 2 ) ( 2 s + 2 )}

\frac{e ^{- s - 2}}{2 s ^{2} - 2 s - 4}

求解步骤

\frac{e ^{- s - 2}}{( s - 2 ) ( 2 s + 2 )}

乘开

(s - 2) (2 s + 2) : 2 s^{2} - 2 s - 4

= \frac{e ^{- s - 2}}{2 s ^{2} - 2 s - 4}

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e x p an d e x p an (1 + 4 x)^{7}

e x p an d (x - 2) (y^{2} + 25) d x

e x p an d so l v e (π \cdot r^{2} + π \cdot r \cdot 5.4 = 46.5, r)

e x p an d \frac{3}{( z - 1 ) ( z + 2 )}