write an expression that represents the width of a rectangle with length x+5 anmd area x to the 3 power + 12x to the 2nd power+ 47x+60

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1. Divide the area by the length.

width = (x^3 + 12x^2 +47x +60)/(x + 5)

That ratio can be simplified by factoring x+5 out of the numerator, and cancelling it with the deominator.

You will be left with x^2 + 7x + 12
for the length.

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