∣−2∣=
When we have an exercise with these symbols || we understand that it refers to absolute value.
Absolute value does not relate to whether a number is positive or negative, but rather checks how far it is from zero.
In other words, 2 is 2 units away from zero, and -2 is also 2 units away from zero,
Therefore, absolute value essentially "zeroes out" the negativity of the number.
|-2| = 2