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MATH HELP NOW

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We are doing solving polynomials using the zero factor property and here is the question:

Marie has a rectangular board 18 inches by 23 inches around which she wants to put a uniform border of shells. If she has enough shells for a border whose area is 282 square inches, determine the width of the border. (the border has x's as the width and length)

  • MATH HELP NOW -

    So the board AND the border have an area of
    A2=(18+x)(23+x)
    The board alone is
    A1=18*23
    A2-A1=282
    Solve for x.

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