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Algebra

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Swimming space. 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 -

    Area = length * width
    length = (2x-1)m
    width = (x+2)m
    Area = (2x-1)(x+2) m^2
    Multiply the two factors (use FOIL).

  • Algebra -

    Area=Length*Width
    Length = (2x-1)m
    Width = (x+2)m
    So, Area = (2x-1)(x+2)m^2
    Substitute the "x" with 5.
    So, Area= (2(5)-1)(5+2)m^2
    Solve for Area now
    Area= (9)(7)m^2
    Area= 63m^2

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