Harry created a canvas painting on a square canvas. he then placed an order for a new rectangular canvas. the side length of the old square canvas is x inches. the new canvas he ordered has the same length, but a width 8 inches greater than that of the old canvas. the area of the new canvas is given by the quadratic expression below, where x represent the side length in inches of the old canvas.
x(x+8)
match each expression to the description it models.