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Math Help - Discriminant

  1. #1
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    Post Discriminant

    The discriminant of 0 = a + bx +cx^5, c is not equal to 0, is c?State true or false?Give reason?








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  2. #2
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    Is "discriminant" defined for equations of degree 5?
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  3. #3
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    DIscriminant for cubic function is =
    -4b3d + b2C2 -4ac3 +18abcd - 27 a2d2
    See in wikipedia
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  4. #4
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    Quote Originally Posted by puneet View Post
    DIscriminant for cubic function is =
    -4b3d + b2C2 -4ac3 +18abcd - 27 a2d2
    See in wikipedia
    Yes, but you wrote 0 = a + bx +cx^5, which is rather 0=a+bx+cx^3 isn't it ?

    The discriminant of mx^3+nx^2+px+q=0 is n^2p^2-4mp^3-4n^3q-27m^2q^2+18mnpq

    Here, m=c, n=0, p=b and q=a.
    Thus the discriminant is :
    -4cb^3-27c^2a^2
    =c(-4b^3-27ca^2)

    But I don't quite understand your question...
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  5. #5
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    degree 5

    Very wrong question has been asked It is of degree 5.






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