展开-1/(s+1)-2s-2+(1/(s+1))

解答

展开

- \frac{1}{s + 1} - 2 s - 2 + (\frac{1}{s + 1})

- 2 s - 2

求解步骤

- \frac{1}{s + 1} - 2 s - 2 + (\frac{1}{s + 1})

去除括号:

(a) = a

= - \frac{1}{s + 1} - 2 s - 2 + \frac{1}{s + 1}

对同类项分组

= - 2 s - 1 \cdot \frac{1}{s + 1} + 1 \cdot \frac{1}{s + 1} - 2

e x p an d 3 (5 + 13)

s im pl i f y (8 x - 3) (6 x + 2)

e x p an d - \frac{8 x}{( x ^{2} + 1 ) ^{2}}

e x p an d \frac{cos ( 3 x ) - 16 sin ( 3 x )}{( cos ( 3 x ) ) ^{2}}

s im pl i f y 3 y (y + 2) (y - 2) + 5