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    A piece of wire is bent into a rectangular shape with area 85 inches squared. the total perimeter is 60 inches and the rectangle is x^2 in long.
    a)form an expression for the area of the rectangle
    b)by substituting z for x^2 form a quadratic equation in z.
    c) Hence work out all possible values of x

    Have you tried anything? If so, please post a screenshot or similar and point out where you're stuck.
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Updated: October 13, 2017
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