Answer:
(2-x) or (x-2)
Step-by-step explanation:
Given that area of a square is 4-4x+x^2
We know that area of a square = side x side = side ^2
Hence side of a square = square root of area
To find side let us take square root of 4-4x+x^2
This can be written as 4-4x+x^2 = 2^2 -2(2)(x)+x^2
Recall the identity a^2-2ab+b^2 = (a-b)^2
Here a = 2 and b = x
Hence square root can be either 2-x if x<2 or x-2 if x>2
Answer is 2-x or x-2
