化简 8/(2x-10)+3/x

解答

化简

\frac{8}{2 x - 10} + \frac{3}{x}

\frac{7 x - 15}{x ( x - 5 )}

求解步骤

\frac{8}{2 x - 10} + \frac{3}{x}

消掉

\frac{8}{2 x - 10} : \frac{4}{x - 5}

= \frac{4}{x - 5} + \frac{3}{x}

化简

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

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

化简

4 x + 3 (x - 5) : 7 x - 15

= \frac{7 x - 15}{x ( x - 5 )}

s im pl i f y \frac{1}{4} - \frac{3}{8} + \frac{7}{8}

s im pl i f y (2 + 6)^{2}

e x p an d (n + 2) (0.5 n + 1)

s im pl i f y 1 - 2 cos^{2} (x)

s im pl i f y \frac{( a + 8 )}{( a + 2 )} + \frac{( a - 4 )}{- ( a + 2 )}