展开 3/(x(x^2+2x+5))

解答

展开

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

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

求解步骤

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

乘开

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

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

e x p an d A (1, 3) C (- 1, - 2)

e x p an d (\frac{1}{x} + y)^{5}

e x p an d \frac{( ( x - 30 ) \cdot ( x - 45 ) \cdot ( x - 55 ) )}{8750}

e x p an d 2 π r (r + h)

e x p an d (3 a + 1)^{3}