Math - Algebra

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If I have a garden that is square with sides of length x feet and next spring I plan to make it rectangular by lengthening one side 3 feet and shortening the other side by 3 feet.

Find a polynomial A(x) that represents the new area.

By how much will the area of the new garden differ from that of the old garden?

  • Math - Algebra -

    Old garden : x by x or x^2
    new garden :(x-3) by (x+3)

    A(x) = (x+3)(x-3) or x^2 - 9

    difference = old garden - new garden
    = x^2 - (x^2 - 9)
    = 9

  • Math - Algebra -

    Thanks a lot. This really helps me understand the problem better. Hope I can help someday! :)

  • Math - Algebra -

    well the answer is 142

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