Let a and b be real numbers such that a - b = 4 and a3 -b3 = 0
(a) Find all possible values of ab
(b) Find all possible values of a+b
(c) Find all possible values of a and b
This question has no solution because you are stating that a and b have to be equal and then saying a-b=4
Love that unusual answer, and how you noticed that being outside the box.