## Prealgebra (7th Edition)

$16x^2+4$
The perimeter of a square is 4 times any side value since the sides are equal. So the expression to solve is $4(4x^2+1)$. Distribute the 4 to each term: $16x^2$ and $4$ $16x^2+4$ Since we do not know the value of x and this is not an equation, this is the final answer.