展开 ((x-1))/(2*(x-3)^2)

解答

展开

\frac{( x - 1 )}{2 \cdot ( x - 3 ) ^{2}}

\frac{x - 1}{2 x ^{2} - 12 x + 18}

求解步骤

\frac{x - 1}{2 ( x - 3 ) ^{2}}

(x - 3)^{2} = x^{2} - 6 x + 9

= \frac{x - 1}{2 ( x ^{2} - 6 x + 9 )}

乘开

2 (x^{2} - 6 x + 9) : 2 x^{2} - 12 x + 18

= \frac{x - 1}{2 x ^{2} - 12 x + 18}

e x p an d \frac{13 ( s + 2 ) ( s + 1 )}{s ^{3} + 9 s ^{2} + 138 s + 260}

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

e x p an d 3 cos (t) sin (t) - (2 t - 5)^{2} sin (t) + 3

s im pl i f y \frac{3}{8} (2 x^{2} sin (2 x) + 2 x cos (2 x) - sin (2 x))

e x p an d 2 (2 + \times (- (6 - 7 x)) = 13 x - (1 + 4 x))