For a real number x, find the number of different possible values of x^2 - abs(x)^2.
x^2 - l x^2 l
Note that the absolute value of x^2 = x^2
So......this always evaluates to 0
Yes you are very right.
For anyone reading this solution, x has to be a real number as declared in the question, thus x^2 - |x^2| could not be negative...
x can't be i.