find the polynomial for the perimeter and for the area?

find the polynomial for the perimeter and for the area x+9 is listed on top a x is listed on left side of a rectangle

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  • BigMac
    Lv 4
    1 decade ago
    Favorite Answer

    perimeter: P = 2(side 1) + 2(side 2)

    P = 2(x+9) + 2x

    P = 2x + 18 + 2x

    P = 4x + 18 <===ANSWER

    Area: A = side 1 * side 2

    A = (x+9) * x

    A = x^2 + 9x <===ANSWER

    Source(s): i was a math major, points are appreciated, thanks hope this helps
  • Anonymous
    1 decade ago

    Based on the given data,

    L = length of the rectangle = (x + 9)

    W = width of the rectangel = x

    Perimeter = P = 2(L + W) and substituting

    L = x + 9 and W = x,

    the above perimeter formula becomes

    P = 2[x + (x + 9)]

    P = 2(2x + 9)

    For the area,

    A = LW and again, substituting L = x + 9 and W = x

    A = x(x + 9)

    A = x^2 + 9x

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