Question

Whats the absolute value of `abs(-15)`?

Answer 1

`15`

Explanation:

The absolute value is defined as :

When `x in RR`,
`|x|=x,ifxcolor(blue)(≥0)`
`|x|=−x,ifxcolor(red)(<0)`

And `-15color(red)(<0)`, so `abs(-15) = - ( -15) = 15`