How do you solve the inequality # |x + 2| ≤ 3# ?
1 Answer
Feb 8, 2016
Explanation:
We must divide the equation in two parts:
If
The module of a positive number is the same number, the equation gives:
If
The module of a negative number is its inverse , the equation gives:
Now we must multiply x by -1. This will change the comparision sign.
The solution will be the union of the two intervals: