Question

If the area of a square is numerically twice the perimeter of that square, what is the side of the square?

Answer 1

Let "s" be the side of the square then:
perimeter = 4s
area = s²

2s² = 4s
s² = 2s
s² - 2s = 0
s(s-2) = 0
s = 0  ∅
or
s -2 = 0 
s = 2