Question

Formulas, walkthrough, something. I can't figure it out.

Answer 1

[-16,16]U[20,+oo)

Explanation:

1) x-16 ≥ 0

x ≥ 16

2) x-20 ≥ 0

x ≥ 20

3) x+16 ≥ 0
x ≥ -16

- 16. 16. 20

1) - - +. +

2) - - - +

3) - +. +. +

- +. - +

Solution : -16≤x≤ 16 ∨ x≥20