Answer:
2
Step-by-step explanation:
Let the number be n.
Then n^2 = 4n - 4.
Rewriting this in the standard form of a quadratic equation, we get
n^2 - 4n + 4 = 0, or (n - 2)(n - 2)= 0. Only the positive root, n = 2, "works" here.
Check: The square of 2 is = 4(2) - 4 is TRUE. The number is 2.
