展开 1/(x(x-a+b))

解答

展开

\frac{1}{x ( x - a + b )}

\frac{1}{x ^{2} - a x + b x}

求解步骤

\frac{1}{x ( x - a + b )}

乘开

x (x - a + b) : x^{2} - a x + b x

= \frac{1}{x ^{2} - a x + b x}

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

s im pl i f y 6 \cdot (\frac{3}{4} + \frac{x}{2})

s im pl i f y \frac{16 ( 2 - 1 ) ^{6}}{3} + 5442 - 768

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

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