SOLUTION: The length of a rectangular swimming pool is 2x - 1 meters, and the width is x + 2 meters. Write a polynomial A(x) that represents the area. Find A(5).

Algebra ->  Expressions -> SOLUTION: The length of a rectangular swimming pool is 2x - 1 meters, and the width is x + 2 meters. Write a polynomial A(x) that represents the area. Find A(5).      Log On


   



Question 393995: The length of a rectangular swimming
pool is 2x - 1 meters, and the width is x + 2 meters. Write
a polynomial A(x) that represents the area. Find A(5).

Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
A(x) = (2x - 1)(x + 2) = 2x^2 + 3x - 2. Plugging x = 5, A(5) = 2(25) + 3(5) - 2 = 63 sq meters.