Question

Simplify |x| - |-x|.

Answer 1

0

Explanation:

Two cases: if
`x\ge0`

`|x| - |-x| = x - x= 0`

Instead if
`x<0`

`|x| -|-x| = -x -(-x)=-x+x=0`

Alternatively you can try to graph both
`f(x) = |x|; g(x)=|-x|` and checking the vertical distance between the two graphs