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24 August, 15:50

The length of a rectangle is 3 inches more than its width. if the length of the diagonal is 15 inches, find the dimensions of the rectangle

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  1. 24 August, 16:15
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    L = W + 3

    L^2 + W^2 = 15^2

    L^2 + W^2 = 225

    L^2 + W^2 = 225

    (W+3) ^2 + W^2 = 225

    W^2 + 6W + 9 + W^2 = 225

    2 W^2 + 6W = 216

    2W^2 + 6W - 216 = 0

    W = 9

    L = 12
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