Question

Find the area of the square.

http://prntscr.com/4edr5m

Answer 1

If you have the length of a side - SQUARE it!

Answer 2

So 4x²? I don't see how that's the answer.

Answer 3

If the length of the side is 4x, then the area is (4x)^{2} = 16x^2
If the length of the side is 2x, then the area is (2x)^{2} = 4x^2

Too bad I can't see your link.

If there is a value for x, substitute that, too.