SOLUTION: The length of a rectangle is 5 meters more than its width. If the area is 84 square meters, what are the length and width?

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Question 551520: The length of a rectangle is 5 meters more than its width. If the area is 84 square meters, what are the length and width?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
width be w
length = w+5
Area = L*W
w(w+5)=84
w^2+5w=84
w^2+5w-84=0
w^2+12w-7w-84=0
w(w+12)-7(w+12)=0
(w-7)(w+12)=0
w=7m the width
length = 7+5 =12 m