Question 545595
the dimensions of the frame are (w + 3) and (w + 13); the product of these is the area of the frame plus the print


the dimensions of the print are (w) and (w + 10)


the difference of the areas is 399


[(w + 3)(w + 13)] - [(w)(w + 10)] = 399 ___ it's not a quadratic because the w^2 terms subtract