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.

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) (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    

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