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A computer manufacturing company would like to come up with a new laptop computer that it's monitor is 80 sq.inches smaller than the present ones. Suppose the length of the monitor of the larger computer is 5 inches longer than it's width and the area of the smaller computer is 70 sq.inches.
Question: What are the dimension of the monitor of the larger computer?
A = (length)(width) 150 = (x+5)(x) 150 = x² + 5x 0 = x² +5x - 150 0 = (x+15) (x-10) x=-15 ; x=10 [Use x=10 because we can not have a negative dimension]
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