因式分解 (-7m^2)/(2m+1)-(11)/(16m-8)

解答

因式分解

\frac{- 7 m ^{2}}{2 m + 1} - \frac{11}{16 m - 8}

- \frac{7 m ^{2}}{2 m + 1} - \frac{11}{8 ( 2 m - 1 )}

求解步骤

\frac{- 7 m ^{2}}{2 m + 1} - \frac{11}{16 m - 8}

使用分式法则:

\frac{- a}{b} = - \frac{a}{b}

= - \frac{7 m ^{2}}{2 m + 1} - \frac{11}{16 m - 8}

分解

16 m - 8 : 8 (2 m - 1)

= - \frac{7 m ^{2}}{2 m + 1} - \frac{11}{8 ( 2 m - 1 )}

14 - 5 x - 8 - x = 3 + 15 - 12 x - 6 x

s im pl i f y (- 2 \frac{5}{8})^{2}

(x + 2)^{2} (x - 6) < 0

x^{2} = (x - 4)^{2}

s im pl i f y \frac{1}{2} - 4