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If the area of a rectangle is 84 square inches.How do i find its length and width? Length is (x+3) width is (x-2).

  • math -

    area = length*width

    (x+3)(x-2) = 84
    x^2 + x - 6 = 84
    x^2 + x - 90 = 0
    (x+10)(x-9) = 0

    x=9, so

    length=12
    width=7

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