New Billboard Dimensions: 4m x (4m + 96cm^2)

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An amusement park wants to place a new rectangular billboard to inform visitors of their new attractions. Suppose the length of the billboard to be placed is 4m longer than its width and the area is 96cm^2. What will be the length and the width of the billboard?
 
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Solve x(x + 4) = 96 for x (which is the width).
 
The original post said "the area is 96 cm^2". That is impossible if the length is to be "4 m longer than its width". Prove It is assuming that the area is 96 m^2.
 

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