2(x+8)*(3x-12)>0⠀|:2

(x+8)*(3x-12)>0

x+8=0⠀⠀⠀3x-12=0

x= -8⠀⠀⠀⠀3x=12

⠀⠀⠀⠀⠀⠀⠀x=4

⠀⠀+⠀⠀⠀⠀⠀_⠀⠀⠀⠀⠀⠀⠀⠀+

///////○-------------------○/////////>

⠀⠀⠀-8⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀4

Ответ: (-∞;-8)U(4;+∞)