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Math Help - Find k

  1. #1
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    Find k

    Find a number k such that the given equation has exactly one solution.

    kx^2 + 24x + 16 = 0
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  2. #2
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    Quote Originally Posted by sologuitar View Post
    Find a number k such that the given equation has exactly one solution.

    kx^2 + 24x + 16 = 0
    A quadratic equation will have exatly one solution when the discriminant is equal to zero.

    The discriminant is b^2-4ac when the quadratic is in standard form.

    Just plug is a=k,b=24,c=16 and set equal to zero and solve.
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  3. #3
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    Thanks...

    Quote Originally Posted by TheEmptySet View Post
    A quadratic equation will have exatly one solution when the discriminant is equal to zero.

    The discriminant is b^2-4ac when the quadratic is in standard form.

    Just plug is a=k,b=24,c=16 and set equal to zero and solve.
    That's very easy to do. Thanks.
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