Area of a square is length by width
So area = (4+x) (4 + x)
Apply FOIL (first, outer, inner, last) to solve this:
(4 ⋅ 4) = 16
(4 ⋅ x) = 4x
( x ⋅ 4) = 4x
(x ⋅ x) = [tex]x^{2}[/tex]
Answer: 16 + 4x + 4x + [tex]x^{2}[/tex]
= [tex]x^{2}[/tex] + 8x + 16 (this is the area of the square)
Happy to help!
