SOLUTION: The length of a rectangle is 9 inches more than it's width its area is 252 in.² find the dimensions of the rectangle

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Question 668741: The length of a rectangle is 9 inches more than it's width its area is 252 in.² find the dimensions of the rectangle
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
252 = (l)(w)
252 = (w+9)(w)
252 = w%5E2+%2B+9w
w%5E2+%2B+9w+-+252+=+0
...
(w+21)(w-12) = 0
w+21=0, so w=-21 : width cannot be negative
w-12=0, so highlight_green%28w=12%29 in
...
l+=+12+%2B+9+=+highlight%28l=21%29 in
...
Check cartoon%28%0D%0A12%2821%29%2C%0D%0A252%29
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