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7 August, 01:48

The length of the top of a table is 7 m greater than the width. the area is 78 msquared2. find the dimensions of the table.

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  1. 7 August, 04:10
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    Let the width = x

    the length = x+7

    => Area equation = length x width = x (x+7) = x^2 + 7x = 78

    => x^2+7x - 78 = 0

    => (x-6) (x+13) = 0

    => x=6 or x=-13 (no)

    => the width = 6 m

    => the length = 6+7 = 13 m
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