11. Keng creates a painting on a rectangular canvas with a width that is four inches longer than the height, as shown in the diagram below.

L= h +4 and H = h

A. Write a polynomial expression, in simplified form, that represents the area of the
canvas.

Keng adds a 3-inch-wide frame around all sides of his canvas.

B. Write a polynomial expression, in simplified form, that represents the total area of the canvas and the frame.