SOLUTION: The length of a rectangle is 2 inches greater than the width. The area is 80in^2. find the length of the rectangle. Thank you

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Question 41036: The length of a rectangle is 2 inches greater than the width. The area is 80in^2. find the length of the rectangle.
Thank you
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
Length(l) = w + 2
Width(w) = w
Length * Width = Area
(w + 2)(w) = 80
w^2 + 2w = 80
w^2 + 2w - 80 = 0
(w - 8)(w + 10) = 0
w+=+8 or w+=+-10
Width can not be negative, so -10 is ruled out.
Plug:
length = w + 2
length = 8 + 2
length = 10