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9 June, 01:35

What is a discriminant as used in math?

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  1. 9 June, 02:07
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    For a quadratic equation in the form

    ax^2 + bx + c = 0

    the discriminant D is found by this formula

    D = b^2 - 4ac

    It's useful to determine how many and what type of solutions we have for x

    If D > 0, then we have two different real number solutions

    If D = 0, then we have exactly one real number solution

    If D < 0, then we have no real solutions (if you learned about complex or imaginary numbers, then you would say you had two complex or imaginary solutions)
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