Answer:
Explanation:
None of the answers look right to me unless you are given something I'm not aware of.
A(x) can be factored. When it is, the following is what is obtained.
A(x) = (x- 3)(x - 3)
Since the area of a square is
Area = s^2
where s is the length of the side, you can find the square root by using the rules of roots.
s^2 = (x - 3)(x - 3)
√s²= √(x - 3)²
√s² = s
√(x - 3)² = x - 3
Therefore the answer should be s = x-3
The only thing I think you can do is ask whoever is presenting the course how any of those answers are obtained.