化简 (6x+5)/(4x-20)-(x+2)/(x-5)

解答

化简

\frac{6 x + 5}{4 x - 20} - \frac{x + 2}{x - 5}

\frac{2 x - 3}{4 ( x - 5 )}

求解步骤

\frac{6 x + 5}{4 x - 20} - \frac{x + 2}{x - 5}

合并

\frac{6 x + 5}{4 x - 20} - \frac{x + 2}{x - 5} : \frac{2 x - 3}{4 ( x - 5 )}

= \frac{2 x - 3}{4 ( x - 5 )}

s im pl i f y \frac{x}{x ^{2} - x ^{2} - 1}

f a c t or 10 x^{2} - 4 x + 10

\frac{96}{18}

s im pl i f y \frac{1}{\frac{1}{20}}

s im pl i f y 31 3^{2} - 31 2^{2}