SOLUTION: The length of a rectangle is 5 cm more than the width. The area is 84cm sq. Find the dimensions of the rectangle.

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Question 208558: The length of a rectangle is 5 cm more than the width. The area is 84cm sq. Find the dimensions of the rectangle.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
L=W+5
LW=84
(W+5)W=84
W^2+5W-84=0
(W+12)(W-7)=0
W-7=0
W=7 ANS. FOR THE WIDTH.
L=7+5=12 ANS. FOR THE LENGTH.
PROOF:
7*12=84
84=84