2. Possible dimensions of the bulletin board: 2 ft. by 9 ft. and 3 ft. by 6 ft.
3. Find two positive numbers whose product equals 18. (Note: Area = length x width)
4. Let w be the width (in ft.). Then the length is w + 7. Since the area is 18, then w(w+7)=18. (Other variables can be used to represent the length or width of the bulletin board)
5. Taking the product on the left side of the equation formulated in item 4 yields w2+7w=18 . The highest exponent of the variable involved is 2.