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Thread: quadratic equations

  1. Sep 7th, 2006, 06:22 PM #1
    fiery123
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    quadratic equations

    find the range of the values of k if the quadratic equation has no real roots.
    2x^2 - 8x + k = 0
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  2. Sep 8th, 2006, 02:33 AM #2
    Glaysher
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    Re: quadratic equations

    If the quadratic ax2 + bx + c has no real roots then the discriminate b2 - 4ac < 0

    So solve (-8)2 - (4 x 2 x k) < 0

    64 - 8k < 0

    8 - k < 0

    k > 8
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  3. Sep 8th, 2006, 06:15 PM #3
    fiery123
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    Re: quadratic equations

    thanks
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