展开 5/(x(x^2+2x+5))

解答

展开

\frac{5}{x ( x ^{2} + 2 x + 5 )}

\frac{5}{x ^{3} + 2 x ^{2} + 5 x}

求解步骤

\frac{5}{x ( x ^{2} + 2 x + 5 )}

乘开

x (x^{2} + 2 x + 5) : x^{3} + 2 x^{2} + 5 x

= \frac{5}{x ^{3} + 2 x ^{2} + 5 x}

e x p an d H (t - 4) (2 - t^{2}) + 3 e^{- π t} + sin (5 t - t^{3})

e x p an d \frac{( 4 x ^{2} + 6 x )}{( ( x ^{2} + 1 ) ( x ^{2} + 4 ) )}

e x p an d \frac{- 15 π - 38}{( 3 π + 6 ) \cdot 5}

e x p an d \frac{( 2 - x ^{2} ) ( x - 3 ) ^{3}}{( x + 1 ) ( x ^{2} - 3 x - 4 )}

e x p an d (3 x^{2} + y^{2}) d x - (a x^{2} + 2 b x y) d y