Question 327198
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I think what you really meant was "Find a polynomial *[tex \Large A(x)] that represents the area of the pool as a function of *[tex \Large x].  Then evaluate *[tex \Large A(5)].


The area of any rectangle is the length times the width, hence:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ A(x)\ =\ (2x\ -\ 1)(x\ +\ 2)]


All you need to do is to multiply the two binomials using FOIL to get the desired polynomial representation. As for the value of the function at 5, you can just plug 5 into what you have:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ A(5)\ =\ (2(5)\ -\ 1)(5\ +\ 2)]


Remember to express your answer in square meters.



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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