Answer:
The absolute valeu of a number is the distance between it and 0, that means that the absolute value of a negative or positive one is a positive
[tex]|-\alpha |=\alpha, |\alpha | = \alpha[/tex]
So, in this case, we have a negative number, which is -4, and, as we know, an absolute value of a number is positive, so we need to change their sign.
|-4| = 4..
