展开 ((-2x-h))/(x^2(x+h)^2)

解答

展开

\frac{( - 2 x - h )}{x ^{2} ( x + h ) ^{2}}

\frac{- 2 x - h}{x ^{4} + 2 x ^{3} h + x ^{2} h ^{2}}

求解步骤

\frac{- 2 x - h}{x ^{2} ( x + h ) ^{2}}

(x + h)^{2} = x^{2} + 2 x h + h^{2}

= \frac{- 2 x - h}{x ^{2} ( x ^{2} + 2 x h + h ^{2} )}

乘开

x^{2} (x^{2} + 2 x h + h^{2}) : x^{4} + 2 x^{3} h + x^{2} h^{2}

= \frac{- 2 x - h}{x ^{4} + 2 x ^{3} h + x ^{2} h ^{2}}

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

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

e x p an d 2 (- 2 x + y = 4)

e x p an d (x + e) (x - π)

e x p an d A (- 5, 3) B (3, 2,) C (- 1, - 4)