化简 7/(x+2)+(x-5)/(x+2)

解答

化简

\frac{7}{x + 2} + \frac{x - 5}{x + 2}

1

求解步骤

\frac{7}{x + 2} + \frac{x - 5}{x + 2}

合并

\frac{7}{x + 2} + \frac{x - 5}{x + 2} : 1

= 1

s im pl i f y 4 x^{4} (2 x + 5 x)

s im pl i f y (- \frac{1}{64})^{- \frac{1}{3}}

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

f a c t or - 15 x^{7} + 3 x^{4} - 9 x^{6}

s im pl i f y - 9 a - 2 (9 a - 5)