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stupidinmath

  • 3 years ago

Find all integers k so that the trinomial 2m^2+km+5 can be factored

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  1. mukushla
    • 3 years ago
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    Discriminant of quadratic (in terms of m) must be a perfect square\[k^2-40=n^2\]

  2. mukushla
    • 3 years ago
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    \[(k-n)(k+n)=40\]

  3. heedcom
    • 3 years ago
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    7 and 11 seem to work, they are the only 2

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