展开 (-2x^2+4x-1)/(x(x-1))

解答

展开

\frac{- 2 x ^{2} + 4 x - 1}{x ( x - 1 )}

\frac{- 2 x ^{2} + 4 x - 1}{x ^{2} - x}

求解步骤

\frac{- 2 x ^{2} + 4 x - 1}{x ( x - 1 )}

乘开

x (x - 1) : x^{2} - x

= \frac{- 2 x ^{2} + 4 x - 1}{x ^{2} - x}

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

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

e x p an d - (7 (2 - 2)^{6} (1 - 0) + c = 0)

e x p an d ab (a + b) - b c (b + e) + a c (a - e)

s im pl i f y e^{i (a + b)}