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19 June, 14:44

Two numbers have a sum of 30 and a product of 209. what is the positive difference between them?

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  1. 19 June, 16:38
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    y + x = 30

    xy = 209

    y = 30 - x

    x (30-x) = 209

    30x - x^2 = 209

    x^2 - 30x + 209 = 0

    x = 19

    y = 11

    the difference is 19-11 = 8
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