SOLUTION: the area of a rectangular picture frame is 80 in^2. if area function is A(w)= W^2+2W, where W is the width, find the width and length.

Algebra ->  Equations -> SOLUTION: the area of a rectangular picture frame is 80 in^2. if area function is A(w)= W^2+2W, where W is the width, find the width and length.       Log On


   

Question 845555: the area of a rectangular picture frame is 80 in^2. if area function is A(w)= W^2+2W, where W is the width, find the width and length.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,



 W^2 + 2W = 80IN^2

 W^2 + 2W - 80 = 0

 (W+10)(W-8) = 0,  W = 8in      (Tossing out the negative solution for unit measure)

and L = 10in  as   A = 80in^2