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19 March, 08:29

The product of two consecutive odd positive numbers is 399. Find the two numbers

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  1. 19 March, 09:49
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    Two consecutive odd number have the form: 2n+1; 2n+3.

    We have:

    (2n+1) (2n+3) = 399

    => 4x^2+8x+3=399

    => 4x^2+8x-396=0

    => 4 (x+11) (x-9) = 0

    => x=-11; x=9
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