Lay T.

asked • 01/11/20

a rectangle has area x^3-15x-4cm^2 and width x-4cm. what is the length in centimeters

1 Expert Answer

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Mark H. answered • 01/11/20

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Area is length time width: A = L * W

You are given the area and the width in "parametric form"--meaning that you would have to know the value of x to get the answer.

To get the expression for length, simply divide A by W

L = (x3-15x-4)/(x-4)

L = x2+4x+1


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Athena V.

I am subbing in for a teacher and I am having problems coming up with the correct answer
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01/31/21

Mark H.

You are implying that you HAVE the correct answer already. I'm not sure how that's possible without knowing the value of x.
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02/01/21

Mark H.

Do you understand how I got the formula for L?
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02/01/21

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