SOLUTION: the length of a rectangular swimming pool is 2x-1 meters,and the width is x + 2meters. Write a polynomial A(x) that represents the area. Find A (5).
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Question 175071: the length of a rectangular swimming pool is 2x-1 meters,and the width is x + 2meters. Write a polynomial A(x) that represents the area. Find A (5).
Answer by SAT Math Tutor(36) (Show Source): You can put this solution on YOUR website!
The formula for the area of a rectangle is length * width. So, the area here is:
(2x - 1) * (x + 2)
Using FOIL:
(2x * x) + (2x * 2) + (-1 * x) + (-1 * 2)
2x^2 + 4x - x - 2
2x^2 + 3x - 2
So, your function is A(x) = 2x^2 + 3x - 2
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