The frame is the same distance all the way around, so the length and width of the picture are 2x longer.
\So, the length can be represented by and the width can be represented by
.
The area of a rectangle is .
Rewrite as the sum of two products.
\Apply distributive property: .
Combine like terms.
\So, the total area of the picture and frame is .
The total area of the picture and frame is .