化简 (x-2)(x-4i)(x+4i)

解答

化简

(x - 2) (x - 4 i) (x + 4 i)

(x - 2) (x^{2} + 16)

求解步骤

(x - 2) (x - 4 i) (x + 4 i)

使用复数算数法则:

(a + bi) (a - bi) = a^{2} + b^{2}

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

(- 4)^{2} = 16

= (x - 2) (x^{2} + 16)

3 y^{2} + 18 y = 0

\frac{x}{2} - 12 = - 6

s im pl i f y (\frac{7}{4})^{2} + 1

5 (x - 8) + 15 x = - 35

77 \leq 5 + 8 n