Question

|x|=-1 x belong to(-infinity,+infinity) ? Why?​

Answer 1

Step-by-step explanation:

Here's why, first of all you need to understand this---

if

|x|= 1, then

x = -1 or 1

Back to your equation

|x|= -x

x = -x or x = x

case-I

x = -x

this case is only possible when x = 0

case-II

x = x

this case can be applied for any number

hence the domain interval of the given equation is (-∞, ∞)