SOLUTION: The length of a rectangle swimming pool is 2x-1 meters and the width is
x+2 meters. write a polynomial A(5) that represents the area find A(5)
Algebra.Com
Question 327198: The length of a rectangle swimming pool is 2x-1 meters and the width is
x+2 meters. write a polynomial A(5) that represents the area find A(5)
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
I think what you really meant was "Find a polynomial )
that represents the area of the pool as a function of 
. Then evaluate )
.
The area of any rectangle is the length times the width, hence:
\ =\ (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:
\ =\ (2(5)\ -\ 1)(5\ +\ 2))
Remember to express your answer in square meters.
John
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