展开 ((7-s))/(((s-1)(s-4)))

解答

展开

\frac{( 7 - s )}{( ( s - 1 ) ( s - 4 ) )}

\frac{7 - s}{s ^{2} - 5 s + 4}

求解步骤

\frac{7 - s}{( s - 1 ) ( s - 4 )}

乘开

(s - 1) (s - 4) : s^{2} - 5 s + 4

= \frac{7 - s}{s ^{2} - 5 s + 4}

e x p an d - \frac{32}{( 2 x + 1 ) ^{3}}

e x p an d \frac{x + 3}{( x ^{2} + 9 ) ^{2}}

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e x p an d \frac{16 ( x - 4 )}{x - 16}

e x p an d \frac{( x - 5 ) ( x + 2 )}{( x - 1 ) ( x - 8 )}