SOLUTION: What is the length of a 45 feet squared rectangle whose length is four feet less than the width?

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Question 146087: What is the length of a 45 feet squared rectangle whose length is four feet less than the width?
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
Area+=+L%2AW
note, L=+W-4
so A=%28W-4%29%28W%29
45ft%5E2+=+W%5E2-4W
W%5E2-4W-45=0
%28W%2B5%29%28W-9%29=0
used highlight%28W=9ft%29
highlight%28L=9-4+=5ft%29
check, A=9%2A5=45 sq ft
Thank you,
Jojo