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19 August, 15:23

A rectangle is drawn so that the width is 5 feet shorter than the length. the area of the rectangle is 36 square feet. find the length of the rectangle.

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  1. 19 August, 16:57
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    w x L = 36

    w = L - 5

    L x (L-5) = 36

    L^2 - 5L - 36 = 0

    Use the quadratic formula

    L = - b + radical b^2 - 4 (a) (c) divided 2. a

    L = 5 + 13 / 2 = 18 / 2 = 9
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