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Math Help - Is this the discriminate?

  1. #16
    Senior Member Mukilab's Avatar
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    Re: Is this the discriminate?

    Quote Originally Posted by Plato View Post
    If \Delta>0 there are two real roots.
    The question says to prove that x^2+2kx-5 has two real roots

    That means I need to assume that its discriminant is >0. Which is k^2+5. k^2+5 has no real roots, therefore there is no way I can prove the equation has real roots.
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  2. #17
    Senior Member Mukilab's Avatar
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    Re: Is this the discriminate?

    Please delete this thread.
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