Hey there!!
Remember: I I stands for modulus, the numbers in the modulus are always positive. They can never be negative.
Given equation :-
f(x) = I x - 2 I
f(-3) = ?
In order to solve this equation, we will need to substitute the value of -3 instead of the ' x '
Plugging in the values
f(-3) = I -3 - 2 I
f(-3) = I -5 l
f(-3) = 5
The required answer is 5
Hope my answer helps!
