SOLUTION: The width of a rectangle is 12 feet less than the length. The area of the rectangle is 540 square feet. Find the dimensions of the rectangle.

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Question 907629: The width of a rectangle is 12 feet less than the length. The area of the rectangle is 540 square feet. Find the dimensions of the rectangle.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
For a rectangle,
A=L%2AW
540=L%2A%28L-12%29
540=L%5E2-12L
L%5E2-12L-540=0
%28L%2B18%29%28L-30%29=0
Two solutions but only one is positive.
L-30=0
L=30
Then,
W=30-12
W=18