Homework Help: 12th grade

Posted by Anonymous on Wednesday, July 21, 2010 at 8:15am.

The length of a rectangular floor is 2 feet more than its width. The area of the floor is 168 square feet. Kim wants to use a rug in the middle of the room and leave a 2 foot border of the floor visible on all sides. What should the length (the longer side) of the rug be?

Math, not "12th grade" - Writeacher, Wednesday, July 21, 2010 at 8:18am
Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.
12th grade - Reiny, Wednesday, July 21, 2010 at 8:40am
first first the dimensions of the room ....

x(x+2) = 168
x^2 + 2x - 168 = 0
(x-12)(x+14) = 0

I am sure you can take it from here

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