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30 September, 11:25

Find the discriminant, describe the types of roots, and find the solution for 3x^2-24x+12

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  1. 30 September, 11:36
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    The discriminant of a polynomial is given by:

    b ^ 2-4ac

    Substituting the values we have:

    (-24) ^ 2-4 * (3) * (12) = 432

    Since the discriminator is greater than zero, then the roots are real.

    x = ( - b + / - root (b ^ 2-4ac)) / (2a)

    Substituting the values:

    x = ( - ( - 24) + / - root (432) / (2 * (3))

    x = ( - ( - 24) + / - root (432) / (2 * (3))

    x = ( - ( - 24) + / - root (144 * 3) / (2 * (3))

    x = (24 + / - 12raiz (3) / (6)

    x = 4 + / - 2raiz (3)

    The roots are:

    x1 = 4 + 2raiz (3)

    x2 = 4 - 2raiz (3)

    Answer:

    432

    the roots are real.

    x1 = 4 + 2raiz (3)

    x2 = 4 - 2raiz (3)
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