展开 (x+2)/((x+8)(x-7))

解答

展开

\frac{x + 2}{( x + 8 ) ( x - 7 )}

\frac{x + 2}{x ^{2} + x - 56}

求解步骤

\frac{x + 2}{( x + 8 ) ( x - 7 )}

乘开

(x + 8) (x - 7) : x^{2} + x - 56

= \frac{x + 2}{x ^{2} + x - 56}

e x p an d \frac{1}{s ( s ^{2} + 4 s + 3 )}

e x p an d (1 - e^{(- 2 v)}) u (v)

e x p an d \frac{3 x + 2}{2 x ( x + 1 )}

e x p an d \frac{x - 7}{x ( x - 8 )}

e x p an d \frac{5 e ^{- 2 t}}{s ( s ^{2} + 1 )}