展开 4/((x+1)(x+5)(s-3))

解答

展开

\frac{4}{( x + 1 ) ( x + 5 ) ( s - 3 )}

\frac{4}{x ^{2} s - 3 x ^{2} + 6 x s - 18 x + 5 s - 15}

求解步骤

\frac{4}{( x + 1 ) ( x + 5 ) ( s - 3 )}

乘开

(x + 1) (x + 5) (s - 3) : x^{2} s - 3 x^{2} + 6 x s - 18 x + 5 s - 15

= \frac{4}{x ^{2} s - 3 x ^{2} + 6 x s - 18 x + 5 s - 15}

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

e x p an d \frac{( x - 2 ) ( - 3 x + 180 )}{x}

e x p an d \frac{( s + 1 )}{( s + 2 ) \cdot ( s + 4 )}

e x p an d \frac{s + 5}{( s + 4 ) ( s + 1 )}

e x p an d (9 x - 2 y = 1, 1) (5) (4 x - 5 y = 9) (- 2)