化简 (s+2+j^2sqrt(3))(s+2-j^2sqrt(3))(s+10)

解答

化简

(s + 2 + j^{2} 3) (s + 2 - j^{2} 3) (s + 10)

(- 3 j^{4} + s^{2} + 4 s + 4) (s + 10)

求解步骤

(s + 2 + j^{2} 3) (s + 2 - j^{2} 3) (s + 10)

打开括号

= (ss + s \cdot 2 + s (- j^{2} 3) + 2 s + 2 \cdot 2 + 2 (- j^{2} 3) + j^{2} 3 s + j^{2} 3 \cdot 2 + j^{2} 3 (- j^{2} 3)) (s + 10)

化简

ss + s \cdot 2 + s (- j^{2} 3) + 2 s + 2 \cdot 2 + 2 (- j^{2} 3) + j^{2} 3 s + j^{2} 3 \cdot 2 + j^{2} 3 (- j^{2} 3) : - 3 j^{4} + s^{2} + 4 s + 4

= (- 3 j^{4} + s^{2} + 4 s + 4) (s + 10)

e x p an d (- 1, - 3) y (2, 3)

e x p an d sec (b) (cos (c) b + 1)

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

e x p an d (12 = 0.074 x + 2.59 + 7.4 x) \cdot 7.4

e x p an d \frac{- 12 x ^{2} - x + 33}{( x - 1 ) ( x + 3 ) ( 3 - 2 x )}