SOLUTION: The length of a rectangle is 5 cm greater than its width. Find the dimensions of the rectangle if its area is 126 sq. cm.

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Question 456398: The length of a rectangle is 5 cm greater than its width. Find the dimensions of the rectangle if its area is 126 sq. cm.
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
n(n+5)=126
n2+5n-126=0
(n+14)(n-9)=0
n=-14 or 9
Throwing out the negative answer, we get the dimensions of the rectangle to be 9 cm. by 14 cm..