The frame will go around all 4 sides of the painting. That means that the length of each side of the painting will increase by 2.5 inches. The height, h, will now be h + 5 (2.5 inches on the top and the bottom). The width, 2h + 3, will now be 2h + 3 + 5 (again, 2.5 inches on the top and the bottom). The area would be given by
(h + 5)(2h + 3 + 5) = (h + 5)(2h + 8)
Multiplying this, we have:
h*2h + h*8 + 5*2h + 5*8 = 2h² + 8h + 10h + 40 = 2h² + 18h² + 40
