展开 ((x^2-3x-4b-12))/(x(x+b))

解答

展开

\frac{( x ^{2} - 3 x - 4 b - 12 )}{x ( x + b )}

\frac{x ^{2} - 3 x - 4 b - 12}{x ^{2} + b x}

求解步骤

\frac{x ^{2} - 3 x - 4 b - 12}{x ( x + b )}

乘开

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

= \frac{x ^{2} - 3 x - 4 b - 12}{x ^{2} + b x}

e x p an d (e + f + e^{4} + f^{4}) (e + f - e^{4} + f^{4})

e x p an d a^{2 (n + 1)} - 2 a^{n + 1} b^{n - 1} + 120 b^{2 (n - 1)}

e x p an d (3 ln (x) + 3 C)^{2}

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

e x p an d (2.001)^{4}