Find expression for difference in areas of new, old decks

C

Connie

New member
Joined
Oct 6, 2006
Messages
14
hi, i became confused when i read this, wat am i supposed to do?

Rick has a deck that is of rectangular shape. its length is three times its width. he decides to enlarge this deck so that the new deck is 6ft longer and 4 ft wider than the original deck. if x represents the original width of the deck, which expression represents the difference between the new deck area and the original deck area?

i got x^2+6x+8 and got it wrong :(
 
deck: x by 3x = 3x^2
new deck: (x+4) by (3x+6) = 3x^2 + 18x + 24

So dutifully perform an appropriate subtraction which will diligently provide the anticipated solution :idea:
 
Sides of original deck are x and 3x. Sides of expanded deck are x+4 and 3x+6.
Difference between the two areas would be "area of new deck minus area of original deck." Give it another go. You can get it.
 
You must log in or register to reply here.
Top